Updated CalendarWeek. Update week.scss.

Updated ``CalenderWeek`` tests to use ``django.utils.timezone.datetime`` rather
than ``datetime.datetime``. Refactored ``CalendarWeek`` to accept
datetimes as an init kwarg. Fixed bug where ``CalendarWeek.slug`` was
returning datetime rather than string.

Updated ``week.scss`` to keep week nav buttons a fixed size rather than
allow them to respond to browser viewport size changes.
Added info to About page
Built out templates for performer list, performer detail, and group list
Added dropdowns to nav bar
Updated packages and requirements.txt
Updated fabfile to python3.
Added staging and production settings files
Added S3StaticStorage class
Added S3MeidaStorage class for media uploads
Removed irrelevant comments from base.py
Reorder css in base.html
Updates to requriments.txt
Fixed CSS bug
Updated to python 3.4
Corrected requirements file
debugging css