Python 3.4 and Django 1.7

Support for Python 3.4 and Django 1.7. Python 2.5 support has been dropped.

Django 1.7 Support

Support for Django 1.4 through 1.7.

Uses stdlib json when available fallback to django.utils.simplejson (when running Django 1.4 w/ Python 2.5).

Addresses #26, #27 and #31.

Protocol-relative URLs Support

Protocol-relative URLs are now supported by the templates.

Resolves issue #33 , #18 and #15.