Changes to be committed:
	modified:   WPScore/WPPart.cpp
	modified:   WPScore/WPPart.h
In spite of danger, we can convert double to Fraction now. Be careful!
 Changes to be committed:

	modified:   WPScore/WPLib.cpp
	modified:   WPScore/WPLib.h
TrieNode & Fraction::operator -() added.
 Changes to be committed:
	modified:   WPScore/WPLib.cpp
	modified:   WPScore/WPLib.h
Adjusting Windows Platform.
Testing the existence of a file.
Merge branch 'master' of https://github.com/bg95/WhitePigeon into Pt-Cr
A bug in WPSynthesizer fixed, better simulated sound of a tuning fork