Review Zip specific display and edit copy to describe edit of start file

Zip - Zip works a bit differently then implied by the treatments as the check boxes were not very workable given there can be only one start file. On Dev, when you edit a zip like: http://dev.curriki.org/xwiki/bin/view/GWT/Editor?xpage=plain&page=Coll_jmarks.7-013Spring-2006 , when you open contents, you can click on and select any file and that becomes the launch or start file when you save. This is not clear and a direction line might be needed. Upload file might need some more description too ("Upload a new version of the archive" or some such.)

Please review...