Blender Git Loki

Enable Onion Skin for Annotations

Back port and adapt to 2.8 the onion skin for annotations in View 3D and Sequencer.

Added only basic features. For onion skin advanced features use grease pencil object.

Merge branch 'blender2.8' into greasepencil-object

Add vtx boundry setting

Merge branch 'blender2.8' of https://git.blender.org/blender into npr_tess

Merge branch 'blender2.8' into greasepencil-object

Reorganize Mask button and rename to Clamp

Now the Clamp is valid in Normal layers and the value is OFF by default.

Use Stroke Alpha when mix Normal Layers

added example functions for accessing LANPR occlusion data

Added temporary contour bypass for smooth contour modifier build.

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

# Conflicts:
# release/scripts/addons
# release/scripts/addons_contrib
# source/blender/makesdna/DNA_scene_types.h
# source/blender/makesrna/intern/rna_scene.c
# source/tools

Rename Bled Layers to Layers Blending

Merge branch 'blender2.8' into greasepencil-object

Fix multiply error when blend layer do not cover below layer

Merge branch 'blender2.8' into greasepencil-object

Fix opacity problems when value is 0

Fix noise in blend layers

The antialiasing is generating noise in intermediate layers.

Fix problems with Mask button

Fix ALT key for boundary fill strokes

Add Simplify Blend Layers option

Merge branch 'blender2.8' into greasepencil-object