Blender Git Loki

Add sanity check in mult_face_search

Merge with upstream changes

More opti step tweaks

Make shift fold check and radial insert check more robust

Add sanity check for radial insert face selection

Do not shift cusp edges as they might lead to CCC triangles

Remove fold check from opti wigg/split and fix new vert idx bug

Fix opensubdiv error when not enabled WITH_OPENSUBDIV

Fixed engine compatible panel for camera and speaker data.

Fixed lanpr field always NULL error. (caused by depsgraph scene copy)

Update new vert data if they are shifted

Convert to opti wigg and edge slit to use st coords

Convert mult_face_search to use st space for better accuracy

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