diff --git a/.gitignore b/.gitignore
index eb5a316..3e2f2a8 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
+*.lock
 target
diff --git a/Cargo.lock b/Cargo.lock
deleted file mode 100644
index 2ee7f75..0000000
--- a/Cargo.lock
+++ /dev/null
@@ -1,32 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "autotools"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bdwgc-alloc"
-version = "0.4.1"
-dependencies = [
- "autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cc"
-version = "1.0.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "libc"
-version = "0.2.51"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "774fd1b2d459a939302a0bad631a3de176b8bd5f87cbfc28ceb1f6c18d731094"
-"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
-"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
diff --git a/examples/coroutines/Cargo.lock b/examples/coroutines/Cargo.lock
deleted file mode 100644
index defa638..0000000
--- a/examples/coroutines/Cargo.lock
+++ /dev/null
@@ -1,116 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "autotools"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bdwgc-alloc"
-version = "0.4.1"
-dependencies = [
- "autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cc"
-version = "1.0.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "cfg-if"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "context"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "coroutine"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "context 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "coroutines"
-version = "0.1.0"
-dependencies = [
- "bdwgc-alloc 0.4.1",
- "coroutine 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "gcc"
-version = "0.3.55"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "kernel32-sys"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "libc"
-version = "0.2.51"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "log"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "log"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "winapi"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "winapi-build"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "774fd1b2d459a939302a0bad631a3de176b8bd5f87cbfc28ceb1f6c18d731094"
-"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
-"checksum cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "11d43355396e872eefb45ce6342e4374ed7bc2b3a502d1b28e36d6e23c05d1f4"
-"checksum context 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7092f4d8395e0d78008911f93ee73f499d6eb1f0c41342718d8271d2d7c2ad8e"
-"checksum coroutine 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d858f2484e2be5e56f7e5b810459035325abc915cc0c229e3b2226a93409f37b"
-"checksum gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)" = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
-"checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
-"checksum log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
-"checksum log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"
-"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
-"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
diff --git a/examples/dynamic_threads/Cargo.lock b/examples/dynamic_threads/Cargo.lock
deleted file mode 100644
index 9acd83d..0000000
--- a/examples/dynamic_threads/Cargo.lock
+++ /dev/null
@@ -1,39 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "autotools"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bdwgc-alloc"
-version = "0.4.1"
-dependencies = [
- "autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cc"
-version = "1.0.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "dynamic_threads"
-version = "0.1.0"
-dependencies = [
- "bdwgc-alloc 0.4.1",
-]
-
-[[package]]
-name = "libc"
-version = "0.2.51"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "774fd1b2d459a939302a0bad631a3de176b8bd5f87cbfc28ceb1f6c18d731094"
-"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
-"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
diff --git a/examples/free_by_borrow/Cargo.lock b/examples/free_by_borrow/Cargo.lock
deleted file mode 100644
index c871315..0000000
--- a/examples/free_by_borrow/Cargo.lock
+++ /dev/null
@@ -1,39 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "autotools"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bdwgc-alloc"
-version = "0.4.1"
-dependencies = [
- "autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cc"
-version = "1.0.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "free_by_borrow"
-version = "0.1.0"
-dependencies = [
- "bdwgc-alloc 0.4.1",
-]
-
-[[package]]
-name = "libc"
-version = "0.2.51"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "774fd1b2d459a939302a0bad631a3de176b8bd5f87cbfc28ceb1f6c18d731094"
-"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
-"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
diff --git a/examples/free_by_gc/Cargo.lock b/examples/free_by_gc/Cargo.lock
deleted file mode 100644
index cfcd108..0000000
--- a/examples/free_by_gc/Cargo.lock
+++ /dev/null
@@ -1,39 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "autotools"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bdwgc-alloc"
-version = "0.4.1"
-dependencies = [
- "autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cc"
-version = "1.0.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "free_by_gc"
-version = "0.1.0"
-dependencies = [
- "bdwgc-alloc 0.4.1",
-]
-
-[[package]]
-name = "libc"
-version = "0.2.51"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "774fd1b2d459a939302a0bad631a3de176b8bd5f87cbfc28ceb1f6c18d731094"
-"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
-"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
diff --git a/examples/static_threads/Cargo.lock b/examples/static_threads/Cargo.lock
deleted file mode 100644
index a252a23..0000000
--- a/examples/static_threads/Cargo.lock
+++ /dev/null
@@ -1,39 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "autotools"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bdwgc-alloc"
-version = "0.4.1"
-dependencies = [
- "autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cc"
-version = "1.0.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "libc"
-version = "0.2.51"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "static_threads"
-version = "0.1.0"
-dependencies = [
- "bdwgc-alloc 0.4.1",
-]
-
-[metadata]
-"checksum autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "774fd1b2d459a939302a0bad631a3de176b8bd5f87cbfc28ceb1f6c18d731094"
-"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
-"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
diff --git a/examples/suspended_coroutines/Cargo.lock b/examples/suspended_coroutines/Cargo.lock
deleted file mode 100644
index 4dcdfc9..0000000
--- a/examples/suspended_coroutines/Cargo.lock
+++ /dev/null
@@ -1,116 +0,0 @@
-# This file is automatically @generated by Cargo.
-# It is not intended for manual editing.
-[[package]]
-name = "autotools"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bdwgc-alloc"
-version = "0.4.1"
-dependencies = [
- "autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cc"
-version = "1.0.35"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "cfg-if"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "context"
-version = "1.0.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
- "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "coroutine"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "context 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "gcc"
-version = "0.3.55"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "kernel32-sys"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "libc"
-version = "0.2.51"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "log"
-version = "0.3.9"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "log"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "suspended_coroutines"
-version = "0.1.0"
-dependencies = [
- "bdwgc-alloc 0.4.1",
- "coroutine 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "winapi"
-version = "0.2.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "winapi-build"
-version = "0.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[metadata]
-"checksum autotools 0.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "774fd1b2d459a939302a0bad631a3de176b8bd5f87cbfc28ceb1f6c18d731094"
-"checksum cc 1.0.35 (registry+https://github.com/rust-lang/crates.io-index)" = "5e5f3fee5eeb60324c2781f1e41286bdee933850fff9b3c672587fed5ec58c83"
-"checksum cfg-if 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "11d43355396e872eefb45ce6342e4374ed7bc2b3a502d1b28e36d6e23c05d1f4"
-"checksum context 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7092f4d8395e0d78008911f93ee73f499d6eb1f0c41342718d8271d2d7c2ad8e"
-"checksum coroutine 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d858f2484e2be5e56f7e5b810459035325abc915cc0c229e3b2226a93409f37b"
-"checksum gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)" = "8f5f3913fa0bfe7ee1fd8248b6b9f42a5af4b9d65ec2dd2c3c26132b950ecfc2"
-"checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"
-"checksum libc 0.2.51 (registry+https://github.com/rust-lang/crates.io-index)" = "bedcc7a809076656486ffe045abeeac163da1b558e963a31e29fbfbeba916917"
-"checksum log 0.3.9 (registry+https://github.com/rust-lang/crates.io-index)" = "e19e8d5c34a3e0e2223db8e060f9e8264aeeb5c5fc64a4ee9965c062211c024b"
-"checksum log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c84ec4b527950aa83a329754b01dbe3f58361d1c5efacd1f6d68c494d08a17c6"
-"checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
-"checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"