enable admin only in DEBUG mode
starting to add support for django 1.5

Conflicts:
	agora_site/accounts/templates/accounts/signin_form.html
	agora_site/agora_core/urls.py
	agora_site/settings.py
	agora_site/templates/base.html
migrating to the new url format for django 1.5 in templates

Conflicts:
	agora_site/accounts/templates/accounts/auth_forms.html
	agora_site/accounts/templates/accounts/emails/activation_email_message.txt
	agora_site/agora_core/templates/500.html
	agora_site/agora_core/templates/agora_core/election_base.html
	agora_site/agora_core/templates/agora_core/voting_booth.html
parsing user input with care in user invite so that it does not return error 500
making unit tests work again in django 1.5