Update jQuery to 1.9.1 and add jQuery migration plugin – closes #1610

The 1.9 and 2.0 APIs are the same, so we should be able to drop in 2.0 as soon as it is released.
Switch from .attr('selected') to .prop('selected')
Allow case sensitive file names in the Upload field. Fixes #1669
Allow confirm buttons to be inside #context instead of just #contents
Tracking latest JIT
Check that we actually do have an array of extension translations. Fixes #1670
Fix saving of Datasources reverting to be Create Data Source when an error occurs while editing an existin DS. Fixes #1671
Apply the same logic for DSE to the Events Editor. RE: #1671
Make the pagination disabled JS event more specific to handle when datasources are provided by extensions
Add 'silent' mode to the General::realiseDirectory function. Closes #1675
The CustomActions delegate now passes along the selected rows and is not fired unless something was actually selected. Closes #1677
Don't rely on Exceptions to be thrown when finding Language classes, do the right thing and check to see if the directory exists.
Fix backwards compatibility issue with the General::hash function. It now listens for algorithm again.
Ensure that the shutdown function is set before a session is started
Remove other Pickable instances when saving an Event. Fixes #1682
Fix Events adding multiple filter nodes to each entry when using the Allow Multiple filter
Fix pagination alignment being far too low. Closes #1688
Tracking latest JIT
Don't include JIT rules by default on a base Symphony installation
Bump to 2.3.2RC2