Blender Git Loki

Fix snake mode reload.

Now use one-time scene loading. Line/Polygon smooth added.

Cleanup: Fix comment

Fix uniform name

The uniform variable name was wrong.

UI: More changes in Fill panel

Fix some issues with pattern type.

Remove Onion Skinning override by Layer

This option is not required and only add complexity.

The UI panel was removed in a previous commit.

Uniform assign error fixed

Fixed snake line taper error induced by combined batch.

UI: Remove duplicate "Layer" Header text

Now these panels are subpanels of Layer, so it's better don't duplicate name.

Seperated different algorithms into 3 files. Init code minor changes.

Merge remote-tracking branch 'remotes/origin/blender2.8' into soc-2018-npr

Conflicts:
release/scripts/addons
release/scripts/addons_contrib
source/tools

Merge branch 'blender2.8' into greasepencil-object

Cleanup: Fix comment typo

WIP: More changes in Fill Panel

WIP: Redesign Fill Material Panel and options

- Change the Pattern style as an option inside Texture.
- Define only a gradient type with Linear or Radial modes.

Still the panels are not working with the right options by mode.

Remove Opacity parameter for Colors

In order to keep consistency with Blender UI, the color has included the alpha factor in the same property and not as separated value.

This improves the material slots too, because now you can set the alpha directly.

UI: Move Panel Adjustments and Relations as Subpanels of Layers

UI: Small changes to Fill Panel

UI: Changes in Stroke Panel

UI: Changes in Viewport Display Panel