Add ansi_c repository:

Add ansi_c repository:
* Initial commit, has scope analysis and beginnings of type analysis

In pilex:
* Modify text_to_python() to handle stray whitespace on otherwise blank line

In pitree:
* Fixes for TypeDict: a reference to AST.TypeString should have been AST.TypeStr, fix several bugs in the generate_serialize() routine that had never been tested
* Modify text_to_python() to handle stray whitespace on otherwise blank line

In piyacc:
* Modify ast_text_to_python() to handle stray whitespace on otherwise blank line