Trying to upgrade packages with partial success.

* Django upgrade to 1.5.2
    This seems to be working alright but I have not run any tests.
    Which reminds me, are there any tests for this?

* Djangorestframework upgrade to 2.3.7
    This is not fully done yet. It will not break the web pages of
    OpenRelay itself but Lord knows what happens with the API.
    The API code has changed a lot. The original API we were using was
    version : 0.2 and not the rest api package on version 2.3.7.

It might be a good idea to -
* Write tests
* Check the API
* Upgrade to latest version of django-bootstrap

	modified:   apps/core/urls.py
	modified:   apps/django_bootstrap/templates/base.html
	modified:   apps/django_gpg/templates/key_list.html
	modified:   apps/server_talk/api.py
	modified:   apps/server_talk/urls.py
	modified:   apps/server_talk/views.py
	new file:   requirements/upgrade-1-django-1.5-djangorestframework-2.3.7.txt
	modified:   settings.py