Blender Git Loki

Fix Scene datablocks being created with a real user while never having any real datablock user.

Now using new system dedicated to that kind of cases, id_ensure_real_user(), instead.
That way, usercount of Scenes is handled correctly at deletion time.

Reported by @sergey over IRC, thanks.

[Windows/make.bat] Clean only after all parameters have been processed so the full path is known, and require a convenience target to be set. Also added a helpful error message if any of the required data is not available.

Cycles: Cleanup file headers

Some of the files were wrongly attributing code to some other
organizations and in few places proper attribution was missing.

This is mainly either a copy-paste error (when new file was
created from an existing one and header wasn't updated) or due
to some refactor which split non-original-BF code with purely
BF code.

Should solve some confusion around.

Cycles: Move BVH constants to an own files, so they are easily re-usable

Buildbot: Another attempt to have OSX builder fixed

Buildbot: Temporary disable CUBIN compilation

Buildbot: Attempt to use proper Clang for CUDA binaries

Buildbot: Disable QuickTime for the time being

Buildbot machine was updated to the new SDK which seems to have
QTKit removed.

For until we've installed older SDK or ported our code to a new
AVFramework disabling QuickTime.

Fix missing properties editor update when changing 3D View camera

Actually two errors here:
* Properties editor wasn't refreshing on (NC_SCENE | ND_RENDER_OPTIONS) notifiers
* Was using notifier info bits wrongly, needs to send two separate notifiers

Decided to remove ND_RENDER_OPTIONS rather than adding properties editor scene context refresh for it, this is more than a render option change.

OpenGL render: Skip GP passes if viewport has GP visibility disabled

dynamic fracture, divide force by mass to get higher probability of secondary fractures

added dynamic minimum shard size as option

dynamic fracture, fix for passive shards... dynamic cache was not used at all for it

dynamic fracture, added a third new constraint option "none"

dynamic frac fixes (better activation, ability to merge cluster count and group)

crash fixes for dynamic split, also attempt to get rotations correct with limit impact

fix, break anyway if there are no constraints at all

added constraint dynamic percentage and dynamic constraint building option

another fix attempt for rotational anomalies

partial fix attempt for incorrect rotation issue with dynafrac