Blender Git Loki

Very basic printing of cache bake info to have some feedback in
background mode.

Support compilation with SCons (only tested on Linux).

Modification to the node's UI:

- avoid drawing properties' names
- give it a default size
- warn about OpenVDB not being available on the GPU

Correction to some CMakeLists.txt (missed those in some previous commit)

Improvements to compilation with CMake: set flags to be able to build
with or without OpenVDB.

Scons support should follow.

Add OpenVDB version to the system info file

Properly set the fluid transformation matrix.

This time for real, though we need to account for adaptive domain, but
that's for another commit I guess.
Also add metadata to the grid to mark it as in local space.

Make OpenVDB cache properties its own struct/linked list, including some
operators to add caches to, move caches around and remove caches from
the list.

Quiet warning.

Cleanup: unessecary use of Object in get_fluid_description, also make it
static.

Cycles: missing break in GridDescription loop.

Correct update in RNA and send notifier.

Cycles: remove grid name print.

Cycles: tag OpenVDBManager as needing an update when connecting node
sockets during preview rendering.

Cycles: early exit add_volume if we already have a sampler allocated.

This is done by means of a vector of structs which stores the grids'
information, including the grid slot, which is returned if we have a
match.

Fix crash happening when exporting the simulation right after resetting
it (by enabling adaptive domain, high resolution or whatever).

The fluid description should be set after the simulation was
initialiazed as it contains information taken from fields which wouldn't
exist otherwise.

Fix compile issue.

Add an operator to update the transformation matrices of the grids.

Cleanup: grid naming, use CFRA, quiet warning, unused include.

Fluid transform cleanup (avoid reinventing the wheel).