Update urls import format
direct_to_template -> TemplateView
Use {% load url from future %} in cms templates

Using https://github.com/django-future-url
Use {% load url from future %} in conference templates

Using https://github.com/futurecolors/django-future-url
Use {% load url from future %} in emails templates

Using https://github.com/futurecolors/django-future-url
Use {% load url from future %} in proposals templates

Using https://github.com/futurecolors/django-future-url
Use {% load url from future %} in reviews templates

Using https://github.com/futurecolors/django-future-url
Use {% load url from future %} in schedule templates

Using https://github.com/futurecolors/django-future-url
Use {% load url from future %} in speakers templates

Using https://github.com/futurecolors/django-future-url
Use {% load url from future %} in sponsorship templates

Using https://github.com/futurecolors/django-future-url
Use {% load url from future %} in team templates

Using https://github.com/futurecolors/django-future-url
Use {% load url from future %} in dashboard template

Using https://github.com/futurecolors/django-future-url
mimetype -> content_type

mimetype is deprecated and to be removed in Django 1.7.
Use hashlib rather than django.utils.hashcompat