Blender Git Loki

More changes to subdivide modifier

Add weights to subdivide points

Improvements in automatic weight calculation

New parameter to force Fill cache recalc

This is needed for extreme deformations

New operator to generate automatic weights

WIP: Operator to create vertex groups

Only works with the Empty mode.

Cleanup unused function

Cleanup code and comments

Limit Armature modifier to only one instance

More cleanup

Code cleanup: remove unused code

Put text to review

WIP: Add basic functions to deform

Merge branch 'blender2.8' into greasepencil-experimental

Put in place all pieces for Armature modifier

The modifier doesn't do anything yet.

Fixed some matrix fuction naming format

Software mode FOV adapted.

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

# Conflicts:
# release/scripts/addons_contrib
# release/scripts/startup/bl_ui/properties_physics_field.py
# source/blender/makesdna/DNA_scene_types.h
# source/tools

Merge remote-tracking branch 'origin/blender2.8' into greasepencil-object

Hard-core resetting the files to origin/blender2.8

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

# Conflicts:
# release/scripts/addons
# release/scripts/addons_contrib
# source/blender/editors/space_outliner/outliner_draw.c
# source/blender/makesdna/DNA_scene_types.h
# source/blender/modifiers/intern/MOD_mybmesh.c
# source/tools