address #73

Please tell me what you think of this pull, before i get in any deeper.

* fix wait_for_ajax
* MozTrapEditRunPage
* treat runs in manage runs list as sub-objects
* treat suits in create/edit run as sub-objects
* allow for both addition and removal of suites in runs

TODO:
figure out how to drag-n-drop

UPDATE:
pull is now fully ready. note that the test requires native.