jQuery fileupload 9.4.1

I've updated the sources to Fileupload 9.4.1.
It breaks some compatibility with the rails/paperclip-example, but it should work fine with the example here:
http://blueimp.github.io/jQuery-File-Upload/
I've also increased the version number. I'm not sure, if that's okay, but it seemed reasonable, given the breaking changes.