Changed zooming to extent to true
A bit of refactoring to get functionality out of UI.js and into Accordion, also removing some unused UI functionality
Unified error message handling for initial application loading
Now zooming to bounding box of single item on load
Items now appearing in bucket when a session has been loaded
Removed pnotify, added alertify
Switched out all pnotify to alertify
Updated error logging for alertify
Wired up top and item-level session share buttons
Merge pull request #577 from isuftin/master

UI fixes, session sharing, plugin switcheroo, bucket manipulation, messaging fixes