Added in stubbed out Ask Us webservice
Tours iPad home screen
Merge pull request #274 from MIT-Mobile/3.6/dev-intrepid-svoigt

I'm merging because this is ok currently, but please check out my comment
Add stop image getter for full-size URL and fix thumbnail URL
Display stop detail content inside page controller
Add main loop cycle buttons
Change navigation title when scrolled below stop name
Remove back button text for stop details screens
Add directions button to bottom toolbar