Rewrite collectstatic command
Rewrite collectstatic command

The following changes have been made:

* django-staticfiles support has been dropped, as it's only relevant for
  < Django 1.3
* Introduced AWS_FAST_COLLECTSTATIC to disable any custom behaviour
* Try to use storages own functions to fetch correct file entry
* Local hashing is now more memory-friendly

chalkchisel/django-storages,chalkchisel/django-storages