Fix href in fixtures for Python 2 or 3 in top nav
Removed devfixture url unless the site is in DEBUG mode.
Fix for urlpatterns.
Merge pull request #62 from python/bugfix/remove-devfixture

Removed devfixture url unless the site is in DEBUG mode.
Merge pull request #58 from mattoc/add_link_py2or3

Fix href in fixtures for Python 2 or 3 in top nav