begin to adapt the viewer to every video

Need to find tuttle fonctions allowing to get the number of frames and the fps of the video
test tuttle fonctions fps and timedomain
just testing
Merge branch 'workOnVideo' into fpsAndFrames
viewer adapts the timer to the video it is displaying
effect is now applied to all the video
Merge branch 'getFPSandFrames' into develop

Conflicts:
	buttleofx/gui/viewer/qml/TimelineTools.qml