Blender Git Loki

Graph Editor: Restoring most tools

* Copy/Paste still needs to be cleaned up to be functional. Auto-set preview range + View All also need some work to become functional...
* Smooth has been moved to Alt-O hotkey, as Shift-O was taken for Sample
* Renamed a few operators for DopeSheet to be more in line with Graph Editor ones, and to be less obscure.
* The 'join' and 'remove doubles' tools are not likely to be restored. I think that a few of the new tools cover this lack anyway. We can restore them if there is a real need.

* Record tool needs a rethink to be genuinely useful, so it's not included here anymore.
A note for anyone wanting to play with implementing this: store the sampled points using the new FPoint type in the FCurve instead of using BezTriples, as FPoints are used for storing sampled/baked data.