begin porting to qt5
basic work done. need to check compilation
motre compilation cleanup for QT5
porting to QT5
compilation is OK
running Ok under QT5
todo : need to check desktop icon/files under linux
Merge branch 'portqt5'

Conflicts:
	src/slowmoVideo/lib/video_enc.cpp
	src/slowmoVideo/slowmoFlowEdit/flowEditCanvas.cpp
	src/slowmoVideo/slowmoUI/dialogues/flowExaminer.cpp
	src/slowmoVideo/slowmoUI/dialogues/preferencesDialog.cpp
	src/slowmoVideo/slowmoUI/mainwindow.cpp