added '{% load url from future %}' in templates for backward compatibility

added '{% load url from future %}' in templates for backward compatibility with django 1.4 and before, for more info checkout django 1.5 changelog.
Summarising the same: if you are not using {% load url from future %} in your templates, you’ll need to change tags like {% url myview %} to {% url "myview" %}. If you were using {% load url from future %} you can simply remove that line under Django 1.5