Initial work for new ansel image uploader.

Initial work for new ansel image uploader.

This is a custom uploader using pluploader library. Very basic UI
to start, but is mostly functional. Currently falls back to the old
uploader if browser is noscript. Currently attempt to use the following
to upload in this order: html5, flash, silverlight, browserplus. HTML5 supports
drag and drop images right onto the uploader box. Images can be added
pretty much at anytime during the lifecycle.

Still need to refactor the upload view into a single Horde-4ish view
object.

Request: 8862