Try to use a QTimer to manage time in the viewer

Not really efficient for the moment, seems that images are too long to calculate to ensure 25 fps
Merge branch 'develop' into videoQTimer

Conflicts:
	buttleofx/gui/viewer/qml/Player.qml
Adding fps in TimerPlayer

fps is given in QML because it changes according to the node
Try to implement processGraph to improve video reading
Video works better

Need to improve user controls now
Adapt control users to the new way to manage video
Merge branch 'videoQTimer' of github.com:buttleofx/ButtleOFX into videoQTimer
minor print changes
tuttle update: ffmpegreader has been renamed as avreader
minor, add .pyo to gitignore and update QuickMamba
always use ProgressGraph WIP
Try to implement processGraph between timerPlayer and viewerManager

doesn't work, cache stays empty in viewerManager, error somewhere
Bug fix, need to keep hand on ComputeOptions object

Tuttle ProgressGraph object use a link to the ComputeOptions object, because the user could modify it asynchronously. So it should not be destroyed!
Improving user controls on video and cleaning the code
Merge branch 'videoQTimer' into develop