Blender Git Loki

Make radial insert and exten work in 2d space (better accuracy)

Fix broken normal calculation of flipped faces

Add new heuristic in opti step

Modify opti edge split and vertex wigg so they can move new verts

Fixed taper on software side

Fixed taper on software side, merged tess modifier's osd adapter.

Merge branch 'blender2.8' into npr_tess and update to new blender OSD API

Fixed enum in modifier IDs (npr tess modifier and a merged new one)

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

# Conflicts:
# release/datafiles/locale
# release/scripts/addons_contrib
# source/blender/editors/mesh/editmesh_tools.c
# source/blender/editors/space_outliner/outliner_draw.c
# source/blender/makesdna/DNA_modifier_types.h
# source/blender/makesrna/intern/rna_modifier.c
# source/blender/modifiers/MOD_modifiertypes.h
# source/blender/modifiers/intern/MOD_util.c
# source/tools

Fixed shader variable naming style issue.

Python panel engine adaptations

Tweak how potential folds are detected in opti wigg

More work on radi insertion

Rewrite mult_radi

Modified UI for background color display and line layer on DPIX. Added console warning for software rendering.

Change cusp edge shift criteria

Added check if radial insertion flip will create a fold

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

Fix faulty opti radi extend logic

Fix some gcc warnings