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? :)

source/blender/src/space.c

@@ -3807,6 +3807,10 @@ static void winqreadoopsspace(ScrArea *sa, void *spacedata, BWinEvent *evt)
 			outliner_toggle_visible(sa);
 			break;
 		
+		case HOMEKEY:
+			outliner_show_hierarchy(sa);
+			break;
+			
 		case RETKEY:
 		case PADENTER:
 			outliner_mouse_event(sa, event);