Rename IBActions for okUpload and cancelUpload to okDownload
and cancelDownload.  The previous names were confusing me.

EDITED     Vienna/AppController.[mh]
Vienna/English.lproj/MainMenu.nib/designable.nib
Vienna/English.lproj/MainMenu.nib/keyedobjects.nib
Merge the upload->download AppController and mainmenu.nib changes.