Blender Git Loki

Use obmat for manipulator center instead of 'loc'

Would show wrong location with parenting.

Remove BKE_pose_where_is from protectflag_to_drawflags_pchan

Merge branch 'blender2.8' into custom-manipulators

Merge branch 'blender2.8' into custom-manipulators

Sync with 2.8

Add null check to gimbal_axis (sync with 2.8)

Merge branch 'blender2.8' into custom-manipulators

Make 'set override type' menu option of buttons functional.

There's still lots of things to fix or tweak, but basics are now
working.

Free new symbol memory

I forget include the memory free in previous commit

Add finer controll over 'strict' finding of override property operations.

Bring closer RNA and BKE ...override_..._find() functions, add RNA ..._get() ones.

Merge branch 'blender2.8' into greasepencil-object

Rename RNA_property_override_..._get() functions to ..._find()

Matches functions defined in BKE_library_override!

Alembic: rotation mode issue in copy_m44_axis_swap, and added unit tests.

Added float[][] comparison macros to testing.h

I've moved EXPECT_M3_NEAR from abc_matrix_test.cc to testing.h, as that's
a more suitable location.

Add new draw manager symbol for new ob_gpencil object type

Disable depth test for scale widget

Merge branch 'blender2.8' into custom-manipulators

Merge branch 'master' into id_override_static

Fix building on gcc.