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Conflicts:
	src/GUI/TracksView.cpp
	src/Renderer/WorkflowRenderer.cpp
	src/Renderer/WorkflowRenderer.h
	src/Workflow/MainWorkflow.cpp

This factory will enable us to create the pages for the projectWizard,
without ugly code copy/pasta

Since it's notified, the other widgets are already aware of this frame change.
The signal must only be emmited when the PreviewWidget generates a frameChanged event.

This fixes #82

Corrected screwed clipRenderer lengthMs screwed calculation

Everything is now handled in frames, and not in "vlc positions"

This avoid deadlocks introduced in previous commit, and clarify the code.

also fixed a typo in the .pro name