Add options to s3file field type to support allowedTypes. Fixed potential issue with flash errors erroring with TypeError: Cannot read property 'flash' of undefined
Update README.md for options supported on s3file field type
Changing field.options.options to be a property rather than nested for consistency, and updating README.md. Fixing parentheses around the callback of actionQueue.push.
Merge remote-tracking branch 'upstream/master'
Merge pull request #109 from jamlen/master

AllowedTypes for s3file. Implements #107