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 
It's good practice to put braces everywhere, even for single line if statements.  If you add a second line to the if statement, you either remember to add the braces, or forget them and have really weird bugs.