Commit of some improvements when running under Cygwin

* musredit can now be built using Qt 4.5.3 of Cygwin 1.7---however, without online help
* FFTW3 threading in some user functions has been disabled

Obviously, there is a major problem when running musrgui/musredit with Cygwin on Windows7/64bit.
This has not been solved by this commit!

src/musredit/PHelp.h

@@ -64,6 +64,7 @@ class PHelp : public QMainWindow
     QWebView *fView; ///< web viewer
     QLineEdit *fLocationEdit; ///< url address line edit
     int fProgress; ///< progress value (0-100) while loading an url
+
 };
 
 #endif // _PHELP_H_