Add the option to show also the UVs of other selected objects in image
space / uv edit. The code was already there, and the option as a rna
bool, but no ui to set it. Matt figured that the View menu in image
space next to other uv stuff, which only shows when UVs are edited, is
the right place.

Works so that when entering editmode for an object to edit UVs, when
have also other objects selected and this option on, also the UVs of
those other objects are shown in the image view.

Liquidape asked this on IRC, and we thought the feat doesn't exist, so I
looked out of curiosity in the code as was thinking it would be easy to
add. Was surprised to find it there already :)

First time that did anything with 2.5, was sure fun enough to search
thru the code to figure out how things work. Adding this ui thing proved
to be exactly as trivial and nice as it should, and the things under the
hood seemed nice, yay!

Cleanup of pose insert methods for Armature objects, as planned in the post to bf-python.
Two sensible methods left in: armatureobject.insertPoseKey and .insertCurrentPoseKey,
but still left unofficial i.e. not published in the api doc yet, because of additional
error checking is still needed and more testing too. But at least is now in better shape to
work on to be published in a later release.

More things for easying the job of replacing proxy/working armatures in the scenes of Elephants Dream with the final ones: 1) adds removing Fakeusers from Actions to PyAPI, now with a hackish call in the Blender module. Possibility of better ways should be discussed on bf-python. 2) adds BPY Object.copyNLA(otherob) - that was simple 'cause the copy_nla function was nicely in kernel nla.c. 3) Object.convertActionToStrip(), here it gets tricky: the function to convert the active action of an object to a NLA strip was buried inside the respective function in the GUI editnla.c which had also code for reading mouse coordinates and whatnot. So I took the actual copying out of it and moved it to the kernel nla.c as a new function, bActionStrip *convert_action_to_strip (Object *ob). that code used other functions, of which find_stridechannel() was also in editnla.c but free of UI code so i moved it to kernel too. kept things with UI code in editnla.c. tried to be careful with keeping mallocs and the pointer business intact, and tested that this works and after usage Blender gives no memory warnings or anything, so seems ok - but certainly is best reviewed by ppl more active with c coding than me. hopefully this little refactor makes it possible to add this function to the menus too, which was not straightforward earlier when Matt took a look at it.

additions to make the orange rendering preparation script work, sorry undocumented again (we are testing this now and gotta commit to get this to other compus at studio, Stivs make a note to bug me about the doc or someone add it.. :o)

yet another temporary strange but straightforward hack for a script at orange to work! that is: while Joseph is working on the actual Constraint API for bones etc., this allows our armature script to set influences with a simple call: armatureobject.setConstraintInfluenceForBone(bonename, constraintname, influence); fails silently at failure ('cause the c calls used do and no retvals are checked) and is in the strange place (as the current api is largely not object level) but works for us for now (e.g. next few weeks).

returned a revised result output, style "Copied UV from object Cube to object(s) ['Cube.004', 'Cube.003', 'Cube.002', 'Cube.001']."

little sanifying: now copies UV coords from the active object to (other) selected object(s), and rises exceptions for the cases where does not work. documentation to be improved .. and perhaps the API shows RuntimeErrors with messages for the users nicely in popups or something in the phuture.

an initial version of a simple UV copy script, gotta decide and implement the UI integration still, is .. eh suboptimal here, but is noted with XXX in comments with suggestions :) .. thanks for theeth and others on Elysiun who made this, and for Unnamed on irc for digging up .. seems that NMesh -> Mesh conversion was not necessary, but might be a nice excercise.

orange: cleaning up / (msvc) compile fixes to the new editnla functions (experimental / made for baking and AvailRot/Loc keying methods)

orange: py2.3 compat