Blender Git Loki

A few fixes for saving/loading partial mesh visibility (sculptmode): pay better attention to how many verts/edges/faces there really are (not just the visibile ones)

set the render aspect correctly when rendering non square images.

Disable partial mesh visibility when leaving sculptmode.

fix for warning: implicit declaration of function 'id_us_plus'. tsk.

bugfix: #5581 Joining python created curves crashes Blender

Curve_appendNurb() was incorrectly appending Nurb to Curve
rather than using BLI_addtail().

wasnt working for mixed modes

Scripts:
More small updates to the ac3d importer, to calculate normals for the created meshes and to avoid problems with older .ac files.

was missing a check for the end edge that made skinning it raise an error.

== Action Editor ==

Final tweaks to Snapping and Mirroring tools:
* Snap To Nearest Marker
* Mirror Values of Horizontal Axis
* Mirror Over Selected Marker

Further tweaks to the textframe drawing code... it was unnecessarily
complicated...

Partial Bugfix #5713:

Textframe heights now draw exactly as set in the buttons.

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.

Bugfix:

Material buttons: "Strands" menu closed after each button usage. Should
remain open until ENTER or ESC pressed or mouse leaves menu.

Removed annoying print for "icon directory not found". Was a missing check.
Probably, after release, we make this default in installs.

Also cleaned up code a bit.

Restored language order of menu... it apparently uses the order of entries
to remember chosen language.
Currently arab was default even! :)

(Fix caused by commit of 9 days ago)

Removed float.h "tanf()" from composte code. Also removed ifdef for atanf.

(note; this is because blender still follows the convention that no float.h
math is available)

Two in one:

- Bugfix #5714
New option "Save changed images" didn't respect relative file names

- Bugfix #5621
New camera (shiftx, shifty) was missing in IpoWindow as animatable option

Bugfix #5712

UV rendering error: the third value of a UV texture coordinate should be
set to zero always, this enables 3d textures to work uniform with UV.

Also fixed: UV pass output for non_OSA is now equal to OSA, meaning only
used UV face values are in such passes.

Bugfix #5700

Deleting a marker could crash, it was reading memory right after it was
freed.

when a vert is shared by more then 1 vertloop give a nice error and exit