Blender Git Loki

2.5 getting-back-into-coding commit :)

- cleaned up join and split operations. Most noticable is operator callback
design, which should make a design based on user-less exec() first, then
wrap invoke() and modal() around it. The exec() should be callable with
only Context and properties.

- split now works again; and inversed as previously, if you drag from a
triangle (action zone) inside area it subdivides area as expected.

- dragging from triangle outside area, over an edge, joins areas

- split has been simplified, it had too many options... it could just work
simpler (now)

- 'action zone' now is an operator itself, a widget sending an ACTIONZONE event,
which can be handled by others (so other gestures can be added in action zone
too)


Still evaluating:
- context gets set where?
- code structure confuses... what are proper functions for operators?
- what is WM... should low level screen stuff more there?
- when do you send event, notifier?
- files grow to large, will clean


Oh yeah and docs, docs, docs. Coming! :)