modify workorder view to use the following format:

* http://github/backbone-playground/?type=wo:17,
* http://github/backbone-playground/?type=tw:21
clean up request params, examples:

* guest:  ?owner=[uuid]
* odesk: ?owner=paris
              ?type=odesk&owner=paris
* Auth user:      ?type=owner
* Workorder:    ?type=wo:17
cleanup PhotoView rendering for missing origW, origH

* in models.Photo, if response.origW not set, use response.W, etc.
add ?no-image query param to render without IMG.src for LayoutEngine testing