Upload: more restyling, particularly in the help text.  Also, a couple of changes to Jeff's code in upload/utils.py that seem to be necessary to make CSV work for me.  Not yet sure why it worked for him and not for me.
Upload: couple of minor things. (1) removed the CSRF token from the "upload more images" GET form, since it wasn't necessary and took up space in the resulting URL. (2) added a help text clarification about the CSV metadata preview.