c_utils - Basic c utility functions/data structures.

Age	Commit message (Expand)	Author
2020-07-08	Add note on NULL keys	Tucker Evans
2020-07-08	Fix map insert error returns	Tucker Evans
2020-07-08	Add index function for maps	Tucker Evans
2020-07-08	Add reset key function for maps	Tucker Evans
2020-07-08	Add insert function for maps	Tucker Evans
2020-07-08	Add clear & free functions for maps	Tucker Evans
2020-07-08	Add size function for maps	Tucker Evans
2020-07-08	Add constructor for maps	Tucker Evans
2020-07-08	Add structs/typedefs for maps	Tucker Evans