* Fixed value update in sidebar when drawing of lines was disabled.
* Fixed display of wrong edge lengh in edit mode (context.active_object was wrong)
* Added callback removal thanks to Daniel Ashby (hopefully this finally works :-D) https://gitorious.org/blender-scripts/blender-measure-panel-script/commit/5a265e7ceb87b01ab98256c4109a9777730242c8
* PEP8 fixes