Refactor project structure (#507)

tools/example_test.sh

@@ -0,0 +1,20 @@
+#!/bin/sh
+
+set -ex
+
+duration=20
+
+cd $(dirname $0)/..
+
+for directory in $(ls examples); do
+  (
+    cd examples/$directory
+
+    cargo build
+    cargo run &
+
+    pid=$!
+    sleep $duration
+    kill $pid
+  )
+done