WIP: Addign help-overlay stuff to tutorial like info.
Added help overlay stuff, now just need to implement it.
IE8/old firefox fixes (remove console.log, changed array.indexOf to $.inArray())
More work on help stuff.

Starting to properly integrate real help messages.
Added "showHelp" request parameter to make testing easier.
Reafactored help overlay init stuff into HelpOverlayManager.
Comments from Grace added to TODO list.
Help overlays only displayed if their selector matches. Also added help messages for the agree, disagree lists.
Fixed grace's third comment: removed 'show details' from problem page, and removed extra text from button.
Added back button to 'display problems' (if appropriate) and remember scroll position on problem page.
Changed scroll persistence to use the flash object instead of params.