Insights redesign
* Remove dashboard & related assets/tests
* Switch to Bootstrap semantics
* Add redesigned Twitter & Facebook account management for hosted app
* Implement new navigation menu
Don't serialize users setPeople call
More insight cleanup and redesign
Fix broken TestOfReplySpike
Fix broken WebTestOfDeleteInstance
Convert Biggest Fans insight and add test
Insights cleanup continues
Correct insight test names and add to all_plugin_tests