Daniel Lara pointed out that adding a Maintain Volume constraint via 3D view hotkey automatically added an Empty for Target. This should not have been.

New "Maintain Volume" constraint. When attached to a bone, you specify a "free" axis. Upon scaling, this free axis scales normally, but the constraint forces the other two axes to adjust themselves appropriately so that overall bone volume is maintained. So, setting "Y" as the free axis (the default) creates a bone that automatically squashes and stretches when scaling. Thanks to Aligorith, Fweeb, Cessen and others for the feedback.

Patch [19862]: Properly map UV Project from View with camera object.
Previously, calling Project from View for UVs when viewing through a camera produced bad results. You had to scale and stretch the resulting UVs, never resulting in a true "from view" with a camera. Now, what you get in the UV editor is what you saw through the camera.

Applies Patch 20200
Shuffle IK Restriction and iTaSC parameter panels into more fitting context.

Head/Tail property was never added for Track To and Stretch To constraint types. Added to RNA and changed UI check.

RNA update -- added RNA and functions for dealing with the clone UV layer for projection painting. This is just the guts -- someone smart can hook up the UI.

RNA doc update. the "no_zbuf" flag in Defocus node was incorrectly doc'ed as "Use Zbuffer" when it really should be "Ignore Zbuffer".

Add Sticky was essentially a blank operator. Possibly context functions weren't around for this one when it was first looked at. Re-attached so it works now.

Update of older commit (23102) from Bob Holcomb -- fix for Darken mode blending was only in place for nodes, not for general texture blending. This updates texture blending to reflect the fix. Now results don't trend toward black on Darken anymore as factor approaches 0.

Brought back mousewheel multicut to Ctrl-R loopcut tool that was recently added. Tweak still doesn't work for the loopcut op, but it didn't before, so at least we're advancing.