Blender Git Loki

Add dependency update to images. Does nice update to material and image
icons for layer panels.

fix for crash at removing modifier

fix : dont create meshislands for empty shards, causes trouble with rigidbody sim

Projection painting:

* Use dm material cache for faster material lookups
* Fix crash when loading file in texpaint mode.

Refactor:

Materials now include a generated texture paint cache. This solves
some irritating issues with calling synchronization functions too
often in many places. Synchronization only occurs in dependency graph
material updates and when we add layers.

Fix for dupli type bit flags exceeding short range.

The nparticle dupli flag was using 1<<15, which gives issues with signed
short variables. Fortunately there are unused bits in the
Object.transflag, now reuse the deprecated OB_POWERTRACK flag for this.

Also replaced dupli context int type with short to avoid errors with
strict compiler flags.

rigidbody should work without fracture now too

Pie menus beta code.

What is included here:

* Some initial code that lays out and displays items of a pie menu
in a circular manner around the mouse. Collision detection is
still not as expected for a pie menu.

* Code to spawn a pie menu for enums and operator enums (a bogus pie
menu for object mode is included, not yet set to any specific key).
For testing, the sculpt mode stroke mode enum is bound as a pie menu
to A key.

* Support to spawn pie menus from python.

Design could change radically, but best have the code here where all can
checkout and see the state of the code.

some more crash fixes

Added missing support for quaternion attributes in the bparticles API.

Replaced the RBO_GET_MASS and RBO_GET_MARGIN macros with proper
functions.

There is really no reason to use macros for this sort of thing.

Moved build/apply functions for constraints into rigidbody_objects too.

This is only about object-based constraints. Bullet constraints can be
added for other future use cases too outside the objects code.

Moved functions for object component data management (RigidBodyObject
and RigidBodyCon) into rigidbody_objects.c as well.

Moved transform utility functions for objects into the rigidbody_objects
source file.

Renamed them a bit to make clear these are for objects only.

Separation of concerns: Moved functions for building object rigid bodies
and applying Bullet results to them into a dedicated file.

The same should happen for particles, shapes, constraints etc. later.

The purpose of this is to keep the main Bullet world API limited to
dealing with Bullet primarily and avoid fixating it on Object DNA data.

A couple of small fixes for merge issues.

Use instanced object collision shapes for particles instead of plain
spheres. The "collision_shape" attribute is no longer needed, the shapes
can be retrieved from the instanced objects instead (which must be RBs
themselves).

Sensible default value support for particle attributes. Some data types
(normal, color, quaternion, matrix) get common default values, others
are just 0 and have to be defined by the user if necessary.

Added default rotation attribute.

Basic dupli display for particles.

Conflicts:
source/blender/blenkernel/intern/anim.c