Plugins Catalog3.1

Version 3.1 includes
Fix: Pose Transitions rotating wrong way. Now using quaternions, happens much less.
Fix: Icon loading when transitioning. Icons now cached.
Fix: Mannequin point selection not saving.
Patch: Mannequin made features optional, to avoid resetting animations.
Added: Play options to UI.
Added: Create blank entry feature.
Added: Add atom items feature.
Added: Animation sliders
Added Merge options.