Compatibility for both Django 1.4 and 1.5

url tag is now imported from future for backward compatibility

Fixes: bug #1234167

Change-Id: Idcbd7bf886cc47d4fa8ec5a5ccea75a507b7faf2
Adding URL Hint for Data Sources

Fixes: bug 1232038

Change-Id: I0d66c40275f405114c2c3e9bbb6aa3bebce83c29
Merge "Compatibility for both Django 1.4 and 1.5"