So far, we had an operator to 'bake' keyframe curves into samples, but no
way to make the fcurve editable again (i.e. to convert it back into a keyframes one).
Needed to fix mocap addon (see T43259).
Also, fixed a glitch in `fcurve_store_samples()`, since given end frame is included in range,
it is valid to give same start and end frame (in case you want a single point in samples,
not much practical cases, but...).
Note about long lines: I did not touch to two pieces of code (because I don’t see any way to keep a nicely formated, compact code, with shorter lines):
* The node types definitions into rna_nodetree_types.h
* The vgroup name functions into rna_particle.c
eg.
scene.objects.link()
object.constraints.new()
mesh.verts.transform(...)
mesh.faces.active
PropertyRNA stores an StructRNA pointer where these can be defined.
- collection functions rename eg. bones_active -> bones__active, add_object -> objects__add since these should be accessed from the collections only.
- fix warnings in last commit
Added RNA functions for adding and removing Driver Targets. Unfortunately, I couldn't do this by simply adding callbacks for the add/remove of the collection, as I've had to add to extra RNA functions to do that.
Example usage - driving Lamp Distance with Cube LocZ:
myOb= bpy.data.objects["Lamp"]
myOb.driver_add("data.distance")
# drivers is list of F-Curves that have driver data
drivers= myOb.animation_data.drivers
distDriver= drivers[0].driver
dtar= distDriver.add_target("ctrl1")
dtar.id_type= 'OBJECT'
dtar.id= bpy.data.objects["Cube"]
dtar.rna_path= "location"
dtar.array_index= 2
