Ajaxify continuing session select

Minimise the results shown to the user by only showing results relating
to the currently selected studio.
tidy up
Cleanup

Take javascript script away from footer into its own file and tidy up
the code layout.
Ajaxify continuing session select

Minimise the results shown to the user by only showing results relating
to the currently selected studio.
tidy up
Cleanup

Take javascript script away from footer into its own file and tidy up
the code layout.
Merge branch 'Jquery' of https://github.com/DanPurdy/Backup-Diary into Jquery