Committing Abhi's fix for chunked uploads.
Switched event handlers for progress menu initialisation and added markup for upload cancelling controls.  Still have issues where the partially-uploaded file is not cleared, but that likely requires server side implementation.
Added file sizes and server last modified dates to plugin package.
Added overlay div to page during file upload to prevent users interrupting file uploads.
Removed progress box from template and added into script events for centering.
Added manual abort for entire file upload to aid in hanging responses for individual file aborts.
Added dialog message for prohibited file type fail callback.
Added new table link to uploading dialog.
Merge pull request #1 from wolskis/master

Pulling all of sams changes till now. ..