TODO (rewrite)
Mihail Szabolcs (c) 2012, released under the MIT license
Original plugin is Copyright (c) 2008 elctech, released under the MIT license
Updates to plugin for multiple file uploader are Copyright (c) 2010 PRX, released under the MIT license
Conversion of plugin to gem for rails 3 is Copyright (c) 2010 Nathan Colgate Clark, released under the MIT license
Stripping the flex application of UI and adding callbacks Copyright (c) 2010 Nathan Colgate Clark, released under the MIT license
Thanks to yickster (Nick Merwin) for fixing the stopUploading issue