Blender Git Loki

Fix cache not respecting modifier options after save and reload

The pointer back to the OpenVDB modifier within the Smoke modifier was
being invalidated on reload.

Add frame range for cache display

Fix frame evaluation

Implement hide unselected (WIP)

Still has the issue that it only updates after changing frames

Implement frame override

Fix transformation for FumeFX caches

Remove disabled code

Add option to hide the volumemetrics and only show bounds

This is for quick previews

Fix VDB object duplication

Detect incompatible grid types (instead of crashing)

Allow fire-only VDB caches

Fix file saving and loading (properly)

Still missed some stuff before. VDB data in the smoke domain wasn't
being remaped. Also, the filepath was not properly evaluated.

Fix false positive about different grid transforms

Add "None" option to the grid selection menus

Add an option that allows the user to unset a grid.

Implement axis conversion for vector grids

Previously only implemented for float grids, for testing. Now that the
system is validated, implemented the same code for vector grids as well.

Fix file saving and loading

Clean up includes for VDB importer

Merge branch 'master' of git.blender.org:blender into cycles_texture_cache

Add VDB importer functionality

Fix compilation without OpenVDB