Blender Git Loki

Fixed line width incorrect variations under different aspect ratios.

Fixed software mode ortho condition errors in culling. Now working.

Fixed DPIX ortho view.

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

# Conflicts:
# source/blender/makesdna/DNA_scene_types.h

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

# Conflicts:
# source/blender/makesdna/DNA_scene_types.h

Fixed collection header name

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

# Conflicts:
# source/blender/CMakeLists.txt

Software crease threshold follow DPIX's

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

Update tess mod UI split code to upstream changes

Merge branch 'blender2.8' into npr_tess

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

Fixed file data blocks linking error.

Fixed chained line type display control

Fix directional object matrix error

Directional light control object ok, fixing file rw

Fixed dropdown list reference lost issue.