Razer Mutex on Windows

This merge adds mutex locking on RazerController to synchronize the devices for other softwares.

I used "Global\RazerReadWriteGuardMutex" for the mutex name as it's already used on LibreHardwareMonitor: https://github.com/LibreHardwareMonitor/LibreHardwareMonitor/blob/master/LibreHardwareMonitorLib/Hardware/Mutexes.cs#L21