Merge pull request #10 from sardawson/django

we cloned django forms builder and no longer need to install as 3rd part...
merge
new requirements
checkout for user self-registration
add links to forms on index page, require auth (still sandbox work here)
sandbox evalutions dashboard and evaluation form
add django-registration to requirements
add xls export
Merge branch 'django' of https://github.com/RootCauseSIF/portal into django
submitted form; navigation bar
add submitted status to form entries
break out the nav bar into templatetag
fix bug
fix unauthenticated bug
ui enhancements
ui enhancements

 Author:    haoliyuan <haoliyuan147@gmail.com>
Merge branch 'django' of https://github.com/RootCauseSIF/portal into django
Merge branch 'django' of https://github.com/RootCauseSIF/portal into django
Merge branch 'django' of https://github.com/RootCauseSIF/portal into django
Merge branch 'django' of https://github.com/RootCauseSIF/portal into django