Fix IE9 bug where data[1].value (aka 'key') is not set properly
Fix IE <= 9 bug where settings.path is appended twice.

https://github.com/waynehoover/s3_direct_upload/issues/82#issuecomment-17904169

We remove `settings.path` from line 117 and not on line 107 because the form that gets submitted needs to send `settings.path`.
Merge pull request #87 from Hengjie/master

Fix IE9 issue with timestamp/unique_id