C to BL converter

[travisdoor]

The goal is to implement an automatic converter from C headers to BL wrapper code to make all possible C libraries available in BL. It's really time-consuming to do it manually.

Implementation can be based on my old repo c2bl.

Requirements:

• Implemented in BL.
• We can use libclang to get C AST from input C files (wrapper from _modules in c2bl can be used).
• Implementation should support all platforms supported by the compiler.
• The backend should be implemnted as BL module (later availbale in standard API).
• Module API should provide simple functions for conversions to be usable also from build.bl scripts.
• We can have standalone application eventually.