[LoopTools] Fix for GStretch.

Caching of 'delete strokes' was incorrect, making it impossible to
change parameters after conversion of strokes.
[LoopTools] Fix crash when straightening same loop twice
Use HTTPS protocol for arc
Animall addon:

Add support for Surface objects
Add support for simple point animation in meshes and lattices
UI improvements for Shapekey animation
Animall Addon: Some small cleanup
AnimAll: Fix error when there is no active object
AnimAll: Add support for keying edge bevel weight and edge crease
AnimAll: Nicer description
AnimAll: Enable keying of shapekeys on bezier curves (Thanks to Aligorith for yet another API fix!). Also one extra effort to make the use of shapekey animation clearer.
Fix for error in keyframing lattice points. Thanks Aligorith for the pointer
AnimAll: Adding info message for preventing people to add keyframes for Shape and Points at the same time. Will not disable it because maybe there's a valid use.
Add 3D Printing category for addon.

This adds the 3D Printing category to the addon such that it's placed in a "3D Printing" tab of the 3D View Toolbar.
Update addon for 3D View Toolbar tabs.

This adds the "Navigation" category for the addon, thus assigning it a tab. Due to this, I've also made the panel open by default. It was closed.
Fix T37897 copy properties operator freeze blender

the script was checking for selected strips one by one,
and sometimes this drives into freeze (can't explain why, but its obviously
a bad way to do it...

now it uses context.selected_editable_sequences, now it is more efficient
and the bug seems to be solved.
Updated add-on to support the new tabs in the Tool Shelf.

The Edit Linked Library panel now only appears in the Relations tab
AnimAll: Place in animation category (duh!)
AnimAll: Update location description and open by default, now that we have tabs in toolbar there's no need to make space
Merge remote-tracking branch 'hm-blender/master'

* hm-blender/master:
  AnimAll: Update location description and open by default, now that we have tabs in toolbar there's no need to make space
  AnimAll: Place in animation category (duh!)
  Updated add-on to support the new tabs in the Tool Shelf.
  Fix T37897 copy properties operator freeze blender
  Update addon for 3D View Toolbar tabs.
  Add 3D Printing category for addon.
  AnimAll: Adding info message for preventing people to add keyframes for Shape and Points at the same time. Will not disable it because maybe there's a valid use.
  Fix for error in keyframing lattice points. Thanks Aligorith for the pointer
  AnimAll: Enable keying of shapekeys on bezier curves (Thanks to Aligorith for yet another API fix!). Also one extra effort to make the use of shapekey animation clearer.
  AnimAll: Nicer description
  AnimAll: Add support for keying edge bevel weight and edge crease
  AnimAll: Fix error when there is no active object
  Animall Addon: Some small cleanup
  Animall addon:
  Use HTTPS protocol for arc
  [LoopTools] Fix crash when straightening same loop twice
  [LoopTools] Fix for GStretch.