Converts C API header files to .hsc and .hsc.helper.c files

Usage: c2hsc <Lib Prefix> [cpp options...] <FILE>.h

This will create <FILE>.hsc, and <FILE>.hsc.helper.c if the header file contains inline functions.

For example, in hlibgit2 on the Mac I'm using:

c2hsc Bindings.Libgit2 -U__BLOCKS__ libgit2/include/git2/tree.h