C++ coding/style guidelines

[connor.worley]

https://github.com/Team5499/frc-cpp-guidelines

I've started to write up some guidelines for C++ in FRC, as my team intends to switch to C++ next year, and wanted to share with the public. Pull requests are welcome!

[AustinSchuh]

We've been following Google's C++ style guide.

[connor.worley]

Originally Posted by AustinSchuh

We've been following Google's C++ style guide.

This has evolved a bit over the years from Qualcomm -> 968 -> 1538 -> 5499. Some detail has been removed.