C++ GET/POST, Diceapp and python diceapp

C++ GET/POST, plus diceapp. Also added READMEs for all sections with how to install/use the libraries used in the programs.

@bdonald25 
If you need to include a C Standard Library file, you should include <cstdio> over <stdio.h>.  However, you shouldn't be using <iostream> and <cstdio> simultaneously anyway.