Track Number of Bing Searches

Added as Google Analytics event with secondary dimension on search type.
Tidied-Up Google Analytics

Changed from individual pushes to single push (faster) and added load
time tracking.
Merge branch 'NeilCresswell-home-page'
Other Editable Timelines Added to Home Page

When user is logged in, the user's My Timelines section on the user's
home page now also displays other timelines that the user has edit
rights to, in addition to the user's own timelines.
HotFix: Switch Production to Use Non-Minified JS

In order to help investigate various bugs in production, we are
temporarily switching from using minified JS to the original JS. This
change will eventually be reverted.
Merge branch 'home-page' of git://github.com/NeilCresswell/ChronoZoom into NeilCresswell-home-page
Merge branch 'NeilCresswell-home-page'