Blender Git Loki

Fix for previous commit: Pop up a warning in cases where the operator will refuse to do anything

Action Editor: Added "Push Down" operator to send the current action on to the NLA Stack

This commit exposes the "Push Down" button/functionality found in the NLA Editor
to the Action Editor, so that actions can be added NLA Stack from here too. The
main point of this for now is to make the whole layered-animation workflow nicer
more efficient, but not requiring the second editor be visible in common cases.
It also conveniently sets things up for the next few changes (already hinted at
here)...

Code Cleanup: Clarify some comments regarding usercount management

(Note for the uninitiated looking at the diffs: this is very much *not* what
you're probably thinking right now, if you're looking at the line in
act_new_exec())

gameengine physics: moving collision filtering inside the collision panel and relabeling some parts

UI: place camera DOF buttons to be more compact

Outliner: rename "Orphaned Datablocks" menu item

Makes the drop-down push searchbox out of the view (which is already quite cramped)
change to "Orphan Data".

BGE: Fix ShowDeprecationWarning macro.

Reviewers: lordloki, brita_, sybren, moguri

Reviewed By: moguri

Differential Revision: https://developer.blender.org/D1144

Py Enum props definition: 'default' parameter cleanup/fix.

* There was no real default value for this parameter (neither "" nor None would work the same as
not specifying that parameter). Now, 'None' is considered as default value, and you get
exact same behavior with this value and if not specifying it. This is important at least for
consistency, and potentially too in some esoteric cases (like generated code or so).
* Add a warning about the fact that 'default' parameter shall not be psecified when items
are given a callback function.

Fix T43834: Text object looses one char after another by entering/leaving edit mode.

Own mistake in refactoring of `BLI_strncpy_wchar_as_utf8()`, if given size was exactly
the one needed, we'd lost last char (off-by-one error).

Many thanks to plasmasolutions (Thomas Beck) who found the issue and did
all the investigation work here!

Get rid of gluScaleImage in our game engine as well.

Make some adjustments to the units for viewport camera dof.

This is still not so correct, to make it work we really have to do a
blurring pass based on the real coc (currently we are just blending 3
levels of blur)

Fix WPaint inactive when painting on a vgroup and the only other vgroup is locked.

`enforce_locks()` would reset weights of non-locked modified vgroups if it could not
find any other non-modified non-locked vgroup to 'distribute' weights into.
Sounds rather stupid, yet I hope I did not break something else, this code
is rather convoluted to say the least.

Side-reported by zeauro (ronan ducluzeau) in T43814, thanks!

Fix T43814: Skinning : set parent with automatic weights doesn't take into account locked vertex groups.

Simply skip a bone's vgroup when it already exists and is locked.

error in last commit

Fix T43605: Spot Cone+Curve creates odd shadow

Curves could leave glFrontFace in an unknown state.

Fix T42833: Kink on nurbs curve

Threshold for normalizing was too big.

Fix T43807: invalid mesh from 2-sided cyclic curve

cleanup: typos

MEM_SAFE_FREE caused issues /w const & GCC5

cleanup: double promotion