Update Select2 to version 3.5.2 (Bug #1384484)

Change-Id: Ia987b37f0f83825ca0de1cbccf01146205ced110
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>
Mahara compatibility changes for Select2 external library

Bug 1384484

Change-Id: Iac8f43ff872af194140f43f84c46ebe73998d0c8
Signed-off-by: Robert Lyon <robertl@catalyst.net.nz>
Merge "Update Select2 to version 3.5.2 (Bug #1384484)"
Merge "Mahara compatibility changes for Select2 external library"