Fix tests

This should allow tests to run (although many are failing). The urlize function was removed in 655a3b15ec3830988c3cc6880b471b4bade301d3 and this broke tests.test_utils. The lofi_link template tag was renamed to mobile_link in 0ac73293e2ca556d8239e637ac66468c4237031e breaking tests.test_templatetags.