Blender Git Loki

- NLA Window:
Added support for Panels, and converted old NKEY menu here.
Also enabled zooming in further, as for Action Window.
(note: this editor can use some work, this action stuff is underdeveloped
and mysterious!)

- UI code
Brought back fix that sets for each Panel a GL matrix for UI code thats
coming after it. This makes system more flexible, and prevents conflicts
with other uiBlocks in a window (like ipo, action).
This will give a tinsy bit more load for moving mouse around... please
report back if this causes troubles.