Blender Git Loki

Quick hacky fix for crash on undo (for Grease Pencil)

AnimData is not copied when making duplicating bGPdata for internal usage
(i.e. for the undo buffer); instead, the data was being shared between the
real copies and the undo buffer copies (to save memory - since otherwise
we'd have to have copies of all the animation data floating around).

The fix here clears these refs before trying to free these copies,
making sure that the data won't get freed incorrectly.

Another attempt at making the GPencil pie menu more useful

Selection operators are now back in the main menu, along with tools for
duplicating and deleting. For now, mirror and bend are still in their own
separate pie that can be accessed via the "More..." entry.

Fix: Doing OpenGL renders of GPencil sketches drawn in sequencer won't show points now

Tweaks to GPencil keymaps

* Moved pie menu to Ctrl-D instead. DD turned out to be far too easy to accidentally
trigger when quickly trying to draw 2 strokes in rapid succession.
* Disabled for now the hotkeys for 'straight line' and 'poly' draw tools. These
weren't that easy to remember/use, and were getting blocked by the new pie menu
anyway.

Merge branch 'master' into GPencil_EditStrokes

Conflicts:
source/blender/editors/gpencil/drawgpencil.c
source/blender/editors/gpencil/gpencil_ops.c

Refactor widgets to always be recreated on redraw - like buttons.

This allows us to spawn a different number of widgets per frame, which
will be needed for shapekey doritos. Also added a widgetgroup for the
shapekeys

Merge branch 'master' into gooseberry

Missing bmesh include folder for hair editor in scons.

Apply the hair matrices when converting from particle keys to bmesh,
so the edit data is consistently in object space.

Fix for GL buffer size for edges, needs to 2x for two vertex indices.

Tube Case: expose precision factor to Tx operator, and disable it for modifier.

Note that we make a generic 'islands handling precision' factor, so that if
we become even more advanced later, we can control other parameters with this
single outside/public factor.

New drawing code for hair edit mode.

Merge branch 'master' into mesh-transfer-data

Add stub operator for widget operation so it is blocking and events do not get
lost when region changes.

Merge branch 'master' into gooseberry

Merge branch 'viewport_experiments' into gooseberry

Conflicts:
source/blender/gpu/intern/gpu_buffers.c

Merge branch 'master' into viewport_experiments

Conflicts:
source/blender/editors/space_view3d/view3d_draw.c
source/blender/gpu/GPU_buffers.h
source/blender/gpu/intern/gpu_buffers.c

Revert "Hook up flags to request a specific sorting scheme from GPU buffer setup"

This reverts commit 827ad6075dcf144025db7c4319e9954dcf45b26c.

Removed deprecated code.

Free strand edit memory after use.