[s3boto] Updated and added docstrings
[s3boto] Updated and added docstrings

--HG--
extra : rebase_source : 66af3e81caa89608431d82c4b7f7699cad8f5fdc

chalkchisel/django-storages,chalkchisel/django-storages,multiplay/django-storages,multiplay/django-storages