Blender Git Loki

Cycles: Fix crash caused by freeing unallocated kernel globals

Added full rendering for preview images.

This really requires subprocessing to another Blender for faster rendering;
will come later after other improvements.

Use view_context=False to use active camera instead of viewport.

Merge branch 'multi_previews_id' into temp-sybren-poselib

Revert "Applied my work from temp-sybren-poselib branch."

This reverts commit ffb0ed305d87d236787163abbe33a921d3eaecf6.

Applied my work from temp-sybren-poselib branch.

Still a bit rough. For example, the viewport used for OpenGL rendering is
more or less randomly chosen from the current screen.

Removed pep8 compliance note.

Added a little note about some hackyness.

Add 'copy array' for rna buttons

ctrl-alt-c/v allows to copy/paste whole RNA array, e.g. location, rotation, etc., from UI buttons.

Request from Andy at the studio.

Merge branch 'master' into temp-sybren-poselib

Merge branch 'master' into multi_previews_id

Fix T49856: Blender 2.78 crashes after loading data from a blendfile

Issue here was that py API code was keeping references (pointers) to the
liniked data-blocks, which can actually be duplicated and then deleted
during the 'make local' process...

Would have like to find a better way than passing optional GHash to get
the oldid->newid mapping, but could not think of a better idea.

Ceres: Update to the latest actual version

Brings all the fixes and improvements done in upstream within the last 13 months.

OpenGL: draw NLA strip curves with new imm mode

Part of T49043.

Added 'delete unlocked vertex groups' option.

Fixed deepoon variables for vc2013 compile

Merge branch 'master' into openvdb

BMesh: radial loop (internal API symmetry)

Radial append/remove had swapped args and *slightly* different behavior.
- bmesh_radial_append(edge, loop)
- bmesh_radial_loop_remove(loop, edge)

Match logic for append/remove,
Logic for the one case where the edge needs to be left untouched
has been moved to: `bmesh_radial_loop_unlink`.

BMesh: simplify vert & edge removal

Use reflection BSDF for glossy reflections when roughness is 0.0 to
reduce computational expense and some code cleanup

Code cleanup includes:
- Code style cleanup and removed unused code
- Consolidated code in the bsdf_microfacet_multi_impl.h to reduce
some computational expense