add ast compiler
Merge branch 'master' into ast-compiler

Conflicts:
	src/fsharp/vs/SimpleServices.fs
Merge branch 'master' of https://github.com/fsharp/FSharp.Compiler.Service into ast-compiler
add ast compiler unit tests
Merge branch 'master' into ast-compiler
address pedump bug
Merge pull request #57 from nessos/ast-compiler

Add ast compiler to fsc.fs