Transition Twitter plugin to API version 1.1
* Rewrite TwitterAPIAccessorOAuth to request and parse JSON instead of XML from version 1.1 of the API
** Add JSONDecoder and APIErrorException classes
* Remove all unauth'ed search calls
* Remove all of ThinkUp's API rate limiting accounting code, since Twitter does this for us
* Update API call paths (and test data filenames)
* Removed fetchFriendTweetsAndFriends
* Removed all page-based favorites processing (pagination deprecated in 1.1)
* Added TwitterAPIEndpoint class and tests
** Build throttling into crawler apiRequest function; check API endpoint call balance against max percentage use ceiling
Closes #1430
[DB MIGRATION REQ'D] Remove deprecated fields and plugin settings from database
Fix 'Error starting crawler; another crawl is already in progress' on manual update
Lower logging level of API call limit allocation from error to info
Refresh Data link on Insights now pulls Developer Log setting.
The refresh data link in the status bar of the Insights view was ignoring the enable developer log setting (defaulting to not being enabled). I noticed this was a quick fix of adding this variable for the Insights controller (in addition to the Dashboard controller).
Closes #1474
Search fixes
* URL encode network and username
* Prevent blank page on reloading a search
Fixed incorrect chart div ids, closes #1488
Correct Post Style insight grammar, closes #1485
Correctly style FB page delete buttons, Back to plugins link, closes #1449, closes #1448
Fix misplaced ExpandURLs plugin settings area
Don't allow filenames with colons in them in the repository for testing, closes #1484
Fix broken Expand URLs configuration area tests
Delete unneeded test data file [ci skip]
Remove TwitterCrawler::fetchUserTimelineForRetweet function, closes #670
Replace smart quotes substituted chars with double-quotes
Add ability to search Twitter followers' names and bio lines, closes  #1257
Default Twitter follower search to bio line unless name: is specified
Fix broken Foursquare avatar, closes #1483
Reword crawler header text, closes #1481
Big Reshare insight: display post text that was reshared, closes #1478