Second beta and 4th release of the new version of Pitivi based on GES.
All the improvements from 0.91, 0.92 and 0.93, plus:
* The main toolbar and menubar have been replaced by a headerbar and menubutton, saving a significant amount of precious vertical space and using the horizontal space better.
* The viewer has been ported to use a GStreamer GL video output sink instead of the Clutter sink. This solves crashes when running Pitivi outside of GNOME Shell and is expected to be a more future-proof solution.
* We dropped our use of CoGL APIs, namely path_round_rectangle which caused crashes on various Linux distributions shipping a broken version of CoGL
* Pitivi has been ported to Python 3
* Text wrapping in the rendering progress dialog and title editor has been fixed
* Effects can now be reordered within a clip's properties
* The default positioning of UI components (when starting from a fresh install) has been improved to be balanced properly
* Undocked window components do not shift position on startup anymore
* Docked window components do not shift position on startup anymore, when the window is not maximized.
* The title editor's UI has been simplified, and now supports decimal font sizes
* Educational infobars throughout the UI have been tweaked to make their colors less intrusive
* The user manual is now up to date with the state of the new Pitivi series
* Port deprecated GTK+ widgets to new ones
* Timeline UI animations have been tweaked
* Code refactoring and cleanup all over the place
* Various build and packaging fixes
* Various fixes to the test suite
* Various other bugs have been corrected
