Basic switch from wxWidget to Qt (not working yet)
Fix: move lines (focus by clicking)
Done: reproduced the wxwidgets prototype in Qt
Correct management of source<->destionation interaction using signals/slots
Merge branch 'qt-port'

Conflicts:
	MapperGLCanvas.cpp
Merge branch 'master' of github.com:libremapping/libremapping

Conflicts:
	MapperGLCanvas.cpp