Added OSDetection.h
Added OSDetection.h

Contains a single function to make it easy to acquire the current system.

DrItanium/electron,DrItanium/AdventureEngine,DrItanium/neutron,DrItanium/electron-platform,DrItanium/electron,DrItanium/electron,DrItanium/AdventureEngine,DrItanium/electron-platform,DrItanium/electron-platform