This patch adds experimental support for uploading multiple files in one go.
This is achieved by using Flash for selecting multiple images and intitiating
the HTTP upload.

When Flash 8 or higher is detected, an additional icon is added to the usual
upload form. Clicking it will swith the form to the Flash based upload queue.

Things that need work:

  * Better Icon
  * Feedback if Flash detection works on all Flash 8 supported platforms
  * Progress feedback seems not to work on Linux (might be Adobe bug)
  * No final feedback how many images were uploaded correctly

The flash sources are located in lib/_fla/

Any feedback and help would be appreciated.

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