Add functions

Evaluated from: https://github.com/ThuCommix/Sharpex.GameLibrary/blob/master/Sharpex.GameLibrary/Framework/Math/MathHelper.cs
Add original author
Add GCD
Add LCM, change GCD implementation to an iterative one
Add documentation, rename methods
Remove space
Add tests for GCD/LCM
Add tests for all clamp overloads
Add tests for Min overloads
Add tests for Max overloads
Add tests
Add tests to validate exceptions
Add tests for Pow
Fix overflow bug
Add exception tests for long pow overload
Fix WrapAngle, Add Remarks
Move WrapAngle, Add ToDegrees, Add ToRadians
Move functions, Add tests
Comment out rare functions
Merge pull request #7 from nikeee/math

Add Math Functions