Merge pull request #1 from chromano/master

Support for backends from chromano
Minor tweaks and bugfixes, documentation update.

- changed DIMENSION setting to DIMENSIONS (backwards incompatible)
- changed method for passing params to simply include them in instantiation. Previous method(post instance updating) still works.
- bugfix: s3 _upload_chunk renamed to upload_chunk
- bugfix: s3 - multipart upload counters have to start at > 0 (#reallyamazon?)
- updated documentation to include credits to chromano and shockflash, and reworked the backend usage section to be a bit more concise.
- updated documentation to remove qi_toolkit's  @render_to decorator.
grammar and formatting tweaks for the docs
Removed StringIO import which wasn't being used. Changed file io mode.
Moved imports around to conform to PEP8. Switched default backend to local so that you are not required to install boto dependency to use the app. local should allow it to work out of the box for everyone. Removed some spacing.
Working but not fully tested MongoDB backend.
Updated README.
Edited README.md via GitHub
Edited README.md via GitHub
Edited README.md via GitHub
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.
Updated readme to include documentation for the MongoDB backend.
Merge pull request #2 from chrisjones-brack3t/master

MongoDB backend addition, and default backend changed to LocalUploadBackend
Fixed a munging of ThumbnailUploadBackend, added credits, made a couple bits more concise.
Fixed the pip link.
close local files after uploading.
Make the upload view thread safe.

This could probably be done more efficiently, but at least for now downloads won't be
mixed between threads.
Merge pull request #3 from dwaiter/master

File closing and thread safety improvements from dwaiter
Added dwaiter to credits
updated docs and sample to wait to load the fileUploader until the DOM is loaded.