Blender Git Loki

== Sequencer (includes a little bit of Peach :) ==

Reworked image / movie loading, to add the following features:

- Mute strip
- Lock strip (peach request :)
- Crop / Translate _before_ image rescaling
- N-keys editing of start, startofs, endofs, startstill, endstill

Added (currently disabled) data structures for

- proxy support
- strip blend modes (currently only "REPLACE" works, which always did :)

Planed:

- automatic FPS rescaling
- command keys to lock/mute a bunch of selected strips
(which would complete the peach request to lock tracks)

Caveats: now the N-keys dialog is four-tabbed. I think, we should move those
tabs into the panels dialog in the future...