Blender Git Loki

Cleanup: renamed transformName to channel_type

This makes it more clear what the parameter is about.
Especially it is not just a name but the paramter also
controls what type of data is exactly created by the exporter.

Cleanup: Added back explicit object type checks in Animation Exporter

For exporting Lamp Animation or Camera Animation i added utility functions
to fetch the related actions. And only if a matching action was found, the
export was processed for the object. However it turned out that the code
became less clear by this change. So i reverted it back to first check
the object type and only fetch the related action if the object type matches.

Cleanup: prepended bc_ to utility functions (satisfy name convention)

All utility functions from collada should contain the prependix bc_
Some of the new added functions did not comply to the convention.

Cleanup: calculating sample frames get scene action instead of object

Previously the functions for calculating the sample frames have used
the animated object from where they derived the active action. This was
not necessary. I changed the api so that the scene action is now
directly specified for better reading.

Cleanup: Added Helper functions to get Scene actions

This is mostly for cleaning up the AnimationExporter for
supporting the upcoming feature "export all animations".
I also added a few extra checks for existing animations,
which potentially avoid crashes when the calling functions
do not check for existing animations.

Removed const qualifier from EvaluationContext parameter and adjusted the class methods to reduce future merge conflicts in Blender2.8

use voro particle order now correctly, fixes brick fracture problems.

UI: show particle radius & strength in topbar

fix for active fields (cache read)

new cache does not save active fields, e.g. fire. so for now, just
reload them during cache read step

Subsurf: Better crease which represents sharp edges

Enabled infinite sharp patches for topology refiner and evaluator,
which allows to have sharp edge at first subdivision level.

Also tweaked crease export from Blender to OpenSubdiv to have more
artistic control over the whole 0..1 range.

Tool System: initial particle system support

Tool System: sync changes from changes to brushes

Changing a brush now updates the tool.

Merge branch 'master' into blender2.8

RNA: make particle enum public

Fix T56199: Crash on Annotation in (VSE) Image Preview

In some cases (e.g. using old userpref settings/keymaps)
it was possible to trigger a crash when the wrong GP/Annotation
operators were triggered in the wrong contexts (e.g. using
the old GPENCIL_OT_paint in annotation-only contexts like
all the 2D editors).

This commit resolves several issues that were caused by sloppy
code-churn + features that had been hacked on.

Dev Tooling: Instrument motion path calculation operator (for bones) to collect timing data

This will be useful for checking on the progress of our optimisation
efforts, and to generate some nice stats for later.

Armature Panel Tweaks - Motion Paths/Ghosting

Since most animators find Motion Paths more useful than Armature Ghosting:
* Move Motion Paths before Ghosting settings (less scrolling)
* Collapse Ghosting panel by default
* Open Motion Paths panel by default instead

fix in python cleanup function

new motion blur vertvel vector was not being deleted. clearing all dicts before deletion now.

UI: Slightly larger action zone for corner resizing

Pretty minor, from 0.6 to 0.8, but the improvement is noticeable
especially when using a stylus, without overlapping too much with
the buttons and dropdowns in headers.

UI: Group similar Grease Pencil brush settings