Blender Git Loki

Also check for animated UVs to determine if a mesh object has constant
data or not.

Some minor fixes/enhancements.

Asset engines are now only selectable and used in link/append case. Makes no real sense to have
those in other cases (like regular file opening, or even worse when saving a file!).
Also allows to get back asset engine persistance accross filebrowser usage.

Merge remote-tracking branch 'origin/master' into soc-2016-uv_tools

making maxres a public field

Merge remote-tracking branch 'origin/master' into gsoc2016-improved_extrusion

Remove bogus assert check.

Fix crash dereferencing nullptr.

Add support to read and write multiple UV maps.

Whilst Alembic support only one UV layer per mesh, there is a convention
to add multiple UV layers as arbitrary geometry parameter for a given
mesh, so we use it to write all the UV layers to the Alembic files. Only
extra UVs in archives from external software which follow this
convention will be imported.

Merge branch 'asset-engine' into asset-experiments

Merge branch 'id-remap' into asset-experiments

Merge branch 'master' into asset-experiments

Merge branch 'master' into asset-engine

Merge branch 'master' into id-remap

Merge branch 'master' into custom-normals-bmesh

Merge remote-tracking branch 'origin/master' into gsoc2016-improved_extrusion

Merge branch 'master' into cycles_bvh

Add support to stream UVs.

Use new array based iterator for object drawing

Use array for storing object bases in layers

Reading bases of a layer from file still doesn't work :/

fix for converting fm external mode back to objects, used wrong transformation for objects