Blender Git Loki

Two fixes:

- new option for Local Constraint Ipos did not set user counter in
Ipo at file reading, causing data to get lost (not saved).

- Driver feature: the channels "Loc X Y Z" now also use the result
of constraints, but transformed back into local space, as if it
was action X Y Z. Nice stuff for those who understand this...
it means you can drive something with a bone that has constraints.