Added some docstrings. Using mimetypes to guess mimetype of file being uploaded. Collection is now optional and will default to fs if not specified. Moved connection setup into the setup method instead of init.
Added some docstrings. Using mimetypes to guess mimetype of file being uploaded. Collection is now optional and will default to fs if not specified. Moved connection setup into the setup method instead of init.

derek-adair/django-ajax-uploader,brilliant-org/django-ajax-uploader,skoczen/django-ajax-uploader,OnlyInAmerica/django-ajax-uploader,derek-adair/django-ajax-uploader,brilliant-org/django-ajax-uploader,OnlyInAmerica/django-ajax-uploader,brilliant-org/django-ajax-uploader,derek-adair/django-ajax-uploader,skoczen/django-ajax-uploader