add readme

README.md

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+# Haskell WebAssembly Toolkit
+
+## Goals
+  * Provide tool WebAssembly code generation for Haskell
+  * Create infrastructure for Cmm to WebAssembly code generator
+  * Have Fun :)
+
+## Status
+  * Lexer: supports nested block comments and all lexemes from Spec
+  * Parser: parses all examples from WebAssembly Core TestsSuit
+
+## ToDo
+  * Improve error messages for text representation parsing
+  * Renaming Phase: substitute identifiers with correct indexes, expand all implicit type declarations)
+  * Verification Phase: execute verification procedure from Spec
+  * Text Representation pretty-printer
+  * Binary format parser/serializer
+  * Execution Phase: implement simple interpreter for running WebAssembly Core TestsSuit assertions

tests/samples/inline-module.wast

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+(func) (memory 0) (func (export "f"))