Incorporate another "awesome-c" repository

[DanielMazurkiewicz]

https://github.com/uhub/awesome-c

[kozross]

@DanielMazurkiewicz I already went through that one and incorporated everything I felt needed to be. There's some outstanding ones (all issues) which could use an expert pair of eyes. Also, if there's anything on there that's missing, please suggest it, ideally in separate issues.