Blender Git Loki

Merge branch 'npr_tess' of https://github.com/DarkDefender/blender into soc-2018-npr

Always use get_facing function when possible

Only check for FF/BB split on edges that are somewhat close to a zero crossing

Change how opti marks inco faces initially

Cleanup code

Rename all armature modifiers

Now it's possible add several armature modifiers, so need rename all of them, not only first one.

Cleanup: rename manipulator -> gizmo

Missed last commit

Icons: update to r62135

- Added icon for To Sphere
- Added icon for Shear
- Added icons for adding mesh objects
- Added icon for Curve Draw
- Add Curve Extrude to Cursor icon
- Tweak Curve Draw icon
- Simplified Hair Cut icon. Was hard to read
- Tweaks to Hair Puff and Smooth icons
- Added icon for Extrude Along Normals
- Updated Extrude Individual icon to become clearer and more consistent
with "Extrude Along Normals". Now it's easy to see the difference.
- Rip Edge and Rip Region icon tweaks

Note, many icons are regenerated in this commit which
weren't intended to be changed, in some cases this looks to be caused
by material color. Generating again doesn't modify so it
shouldn't be changing every time in future.

Merge branch 'blender2.8' into greasepencil-object

New object type for hair systems.

Tool System: only show select tool w/ paint mask

UI: refactor particle panel/topbar logic

Similar logic for panel & topbar, use same checks.

UI: disable brush popover in particle mode

This currently duplicates the same settings.

UI: use icons for sculpt mode toolbar

Re-order some enums so plus is always first.

Tool System: add curve extrude

Tool System: show radius for circle select

Fix T56517: 2D gizmo hotspot fails

Regression from 80c9cd13dad

Weight Paint: use black for unselected vertices

Contrast for selected vertices mode wasn't very strong.

UI: disable decorators when not used