Made Tone functions in Arduino.h and started ToneTest Project

This makes the tone function with duration use Sleep since SetTime is not in the Galileo Windows image currently.
Look at:
http://msdn.microsoft.com/en-us/library/windows/desktop/hh802935(v=vs.85).aspx

SetWaitableTimer is available.

You'll have to modify the Arduino loop to include SleepEx(0, TRUE) to enable APC processing.