Blender Git Loki

Render Branch:
svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28638:28639
(skipping ghash merge)
svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28640:28643

svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28622:28637

merged over last commit, 28428

Render Branch: svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28613:28622

Fix tile cache crash, IMB_addrectImbuf could free mipmap levels on
convert tiles to rect, but we want to keep them.

Render Branch: svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28593:28613

Render Branch: https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28593:28610

write metadata info into OpenEXR images.
can be viewed with the command line utility 'exrheader'

debug print, left in by accident

Fix image tile cache crash when rendering with the max number of
threads (64), it needs max threads + 1 local caches.

Fix memory free errors for CollisionModifierData.xold.

Fix/workaround for wrong speedvectors in some shots, added an extra
scene_update_for_newframe call to ensure everything is updated to the
correct state before rendering.

Render Branch: svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28583:28593

division by zero fix

Fix crash rendering sss + irr cache, mask value could get a too
high value causing centmask lookup to go out of bounds.

Render Branch: svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28574:28583

Fix light group rendering for case with twice-linked sintel groups.

Fix wrong pixels when reading small mipmap levels from .tx files.

pass string to new hashes as with guarded alloc and memarena, this way theres no need to use a compile time option

Render Branch: svn merge https://svn.blender.org/svnroot/bf-blender/trunk/blender -r28522:28574
note: rna_lamp.c changes didnt make it in.