Blender Git Loki

Fix merge errors

Merge branch 'blender2.8' into greasepencil-object

CMake: Expose Cycles devices support as CMake option

Handy to disable GPU based devices when it's needed to run Valgrind.

CMake: Fix cimpilation error when CUDA dynload is disabled but toolkit is not installed

Merge branch 'master' into soc-2017-normal-tools

Added custom loop normals to work correctly with autosmooth

Merge branch 'master' into blender2.8

Cleanup: use prefix for tests

Allows for running all `bmesh_*` or `object_*` tests.

Object Mode: remove Scene.obedit

This means we can support having the same scene in different windows
with different edit-objects.

GPU: add offscreen buffer drawing utility functions.

Code cleanup: stop using rectangle textures in window draw, simplify code.

Code cleanup: fix incorrect reading of GL scissor coordinates.

These are often the same as the viewport, but not always.

Code cleanup: remove unneeded gla* 2D drawing functions.

Fix blenderplayer build.

external constraints load / refresh fix

fix potential memory leak

another implementation attempt for external constraints

Fix merge compiler error

Merge branch 'blender2.8' into greasepencil-object

Conflicts:
source/blender/editors/space_outliner/outliner_select.c
source/blender/editors/space_view3d/view3d_draw_legacy.c
source/blender/makesrna/intern/rna_sculpt_paint.c

Remove duplicate line