Changes required for Django 1.5

gracedb/settings

gracedb/views.py

templates/admin/base_site.html

templates/base.html

templates/gracedb/event_detail.html

templates/gracedb/event_detail_GRB.html

templates/gracedb/event_list.html

templates/gracedb/gstlalcbc_report.html

templates/gracedb/histogram.html

templates/gracedb/index.html

templates/gracedb/latest.html

templates/gracedb/latest_public.html

templates/gracedb/neighbors_frag.html

templates/profile/notifications.html

templates/rest_framework/api.html