Blender Git Loki

Shifted the dispatch from the algorithm side to the storage side of the
sampling system to keep the code simple.

Now there is a MSurfaceSampleStorage struct that encodes the storage
details, which the algorithms don't have to care about.

Store the waveforms between undo steps when they exist.

Fix compilation in MacOSX

More undo issue solving.

This commit moves sound loading out of library linking. The approach
chosen here is to do lazy initialization by basically validating the
sound before attaching to the scene.

Loading the sound buffer requires a valid Main pointer, which means we
have to pass this around in many places. We might also consider caching
the waveforms in this way too, but for now we're still using the
threaded update.

We'll have to test this somewhat to see if it behaves well..There are
corner cases which might not be covered. Sounds are muted if we undo
during an animation, but this bug existed in master as well.

Added generalized method for creating an array of mesh samples with
arbitrary stride.

Merge branch 'master' into mesh_samples

Missing file from the last renamse (basic stereo > stereo 3d / advanced stereo > multiview)

Set up the main API of the mass spring solver for hair.

Replaced previous HairDebugData with the new equivalent SimDebugData.

Disabled the bf_hair module, to be replaced by general physics module
code.

Merge branch 'hair_immediate_fixes' into hair_system

Merge branch 'master' into hair_system

Conflicts:
intern/cycles/blender/addon/ui.py
intern/cycles/blender/blender_curves.cpp

Merge branch 'master' into terrible_consequencer

Merge branch 'master' into hair_immediate_fixes

Conflicts:
source/blender/blenloader/intern/versioning_270.c

Clear forces and constraints together at the start of the time step,
easier to verify.

Threaded sound strip display data loading.

Sound loading can take too much so move it to a job and continue. This makes
interaction much better. A similar system should be usable for movie previews.

Rename 'Basic Stereo'/'Advanced Stereo' to 'Stereo 3D'/'Multi-View'

Viewport 3D: support for Volume drawing for Advanced Setup (Multi-View) too

(and flipped red-cyan volume colors to match what you see from the
camera)

Use Red-Cyan for the volume drawing

Viewport 3D: Drawing of Stereo Cameras, Convergence Plane and Volume

This also includes:
* Unification of the view_matrix and model_matrix functions.
* Fix for Toe-in formula
* Fix for viewport bug when camera scale was not uniform