Blender Git Loki

More outliner features;

- Made visualization of object hierarchy more clear with lines; this
solves the sometimes confusing mix of 'children objects' and
'linked data'.
- Enter editmode on click, also shows editing context buttons
- SHIFT+click on a item closes/opens all below that item
- Added constraints and Hooks (watch fun icon!)

Note; global undo doesnt restore former view for outliner... it does not
save the GUI, remember? :)