Publication of devel version 20140510

Written for ffDiaporama by domledom on 2014-05-11

Publication of a new devel version of the future ffDiaporama version 2.2

This version fixes 3 bugs :
- Increases the gap between the ref-frames in rendered video to reduce flicker (from 4 to 2 per second)
- Operates the preview player and the player of the video editing dialog even if there is no music track
- Fixed a crash when click in the time bar and the project is empty

and add 4 new transitions: Transitions page type with prior unzoom