Blender Git Loki

Delete objects when cancelling an import.

Cleanup: indent.

Cycles: sync motion vectors when syncing the mesh, not as an extra step.

Fix crash loading a file with an invalid archive.

Merge branch 'master' into alembic_basic_io

Fix own mistake: adding boost inc done wrong way

Cleanup: use has_animations.

Avoid reading custom datas twice.

Normals from the Alembic archive are not read anymore.

Now we generate the normals on the Blender side and set polygon smooth
flag if needed.

Merge branch 'master' into alembic_basic_io

Reset smooth flag when creating a new derivedmesh.

Fix loop normals bot being read.

Merge branch 'master' into alembic_basic_io

Merge branch 'master' into alembic_basic_io

Refactor mesh reading code to de-duplicate logic with data streaming
code.

Only compute normals when creating a new mesh.

Fix crash reading blend file with saved cache file data.

Cycles motion vectors: make sure we sample the velocities at the right
frame.

Fix crash constructing depsgraph with missing objects.

Wait till all of the objects present in the Alembic archive are created
and parentship set before updating the scene and its depsgraph.

Fix parenting issue when objects have both mesh and curves (hair) data.