Update coding guidelines to Google's C++ Style Guide

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The style of many functions in the library have multiple naming conventions. Consider using Google's C++ Style Guide for naming functions, classes, types and objects.

Some references for autoformatting:

• c++ - Visual Studio 2015 autoformatting multiple namespace on a single line - Stack Overflow
• c++ - Is there any way to make Visual Studio stop indenting namespaces - Stack Overflow