Fixing issues in ie8 (Issue #56)

For the issue with uploading, I decided to make the fix in the controller, since I did not want to go in and mess with the qqfileuploader code (who knows their reason for switching the file input's name).

Json responses had to be set with content-type "text/html", as this is a known problem in ie8 and 9 too believe (kind of sucks).