Initial commit of core SACS functionality.  Can parse and print structures in C format.
Added tests for sacs_parse module.
Added sacs_snprintf module.  Added missing sacs_fprintfable.h
Added sacs_parse tests for doubles.
Added sacs_parse unsigned int support
Added tests for sacs_snprintf.  Fixed various bugs.
Update to README.md
Added tests for float.
Beginning adding JSON support.
Various improvements to parsing.
Started adding support for unnamed struct parsing.
Added support for unnamed struct parsing.
Improved parsing of designated and standard members in same initialization.
Added test files
Added test_sacs.c