Blender Git Loki

"New Action" Operator:

When creating new actions using the "new" button the Action Editor
header databrowse, or the NLA editor's "Animation Data" databrowse,
the existing action will get copied (if it exists) instead of an empty
action getting added everytime.

Apparently this behaviour is very good for being able to "version"
actions within a single .blend file (Bassam?)