Blender Git Loki

Removed #pragma marks -- didn't work on Windows.

Also a few tweaks to debugging output.

Merge branch 'master' into newboolean

Some fixes for some small epsilon cases.

Also changed default epsilon to 1e-5 from 1e-6, as the latter
is too close to hairy edge and anyway produceds really tiny faces
and edges that I doubt users really want. There's even a case for
it being 1e-4 by default.

Attempt to do boolean with coplanar faces - doesn't work yet.

Faster find_coplanar_parts.

Added stuff to make MeshAdd access faster.

Coplanar case works except CDT makes a face with repeated vert.

Fixed gwn (atan2 instead of atan), and some perf speedups.

clang-format

Keep track of other orig faces besides eg for a face.

Fixed memory leak of bvh trees.

Regression tests 0-25 all pass.

Code was working but had commented out actual apply of meshchange.

Stashing progress.

Most regression tests now pass.

Put in option checkbox in UI so can choose old or new method.

Boolean coplanar cone-on-cube works.

Needed some work on coplanar faces that may have
reversed normals from projection.

Forgot to initialize an intset.

Added kdtree for faster coplanar.

Initial work on making modifier work. Debugging still.

Use arrays in MeshAdd for faster access.

Changes to master for this branch.