Blender Git Loki

Transform manipulator: New widget for trackball rotation

Adds a new (partially invisible) widget to the rotation transform manipulator that triggers trackball rotation. It is activated by clicking inside the outer white circle, but not on any other axis. For better feedback, a slight white overlay is drawn on mouse hover.

Fix Blenderplayer not compiling

Merge branch 'master' into wiggly-widgets

Conflicts:
source/blender/blenloader/intern/readfile.c
source/blender/blenloader/intern/versioning_270.c
source/blender/editors/include/ED_transform.h
source/blender/editors/interface/resources.c
source/blender/editors/space_sequencer/sequencer_draw.c
source/blender/editors/transform/transform_manipulator.c
source/blender/gpu/intern/gpu_buffers.c

fix for name and indexbased meshisland and meshconstraint lookup via python inside the FM

fix: there was a speed regression when building many constraints during fracture or after loading

manta step updates - reordered some functions

some more mutex locking for dynamic fracture, there still were crashes when interactively moving dynamic objects during running sim

added threading lock to modifier sync during rigidbody object sync, helps against crashes in dynamic mode

improved output of constraint impulse visualization a bit, included name, impulse and threshold as well as attempted to offset strings at same position

windows compile fix

added constraint impulse visualization (very basic only) and reworked the mesh constraint name system

Merge branch 'master' into asset-engine

epsilon fix

compile fix for windows and mac

Assets: add uuid to linked data, write and read it from file.

Note that this is only very first steps, I think we'll need to 'propagate'
uuid to all data used/linked by asset itself, otherwise most things won't get
updated/reloaded. Still have to think about this.

Merge branch 'master' into asset-engine

added basic physics visualization for viewport rigidbodies like in game engine (its optional and can be turned off)

Tangent node support in GLSL (only with selected uv)

Merge branch 'master' of git://git.blender.org/blender

# Conflicts:
# source/blender/gpu/GPU_texture.h

Merge branch 'id-remap' into asset-experiments