c2go

• Added a new ast2json.py script which uses the natural clang output to build the AST in JSON. This removes the need to have python clang libraries and should make it a lot easier to use and more stable.
• c2go.py is refactored to now use this JSON input rather than clang itself.

This is the proof of concept release. It contains a handful of working examples and uses the (now deprecated) Python clang bindings.