Merge pull request #307 from PrimeRevenue/bug/ie8_reorder_causes_misalignment

When columns are re-ordered, IE8 causes the headers to mis-align with th...
Fix rotate for IE9
Additional formData that needs to be sent to server is added
Merge pull request #310 from PrimeRevenue/feature/file_upload_additional_params

feature/file_upload_additional_params
Resolve column spacing even when drag is cancelled.
Adding dist/tent.js