added download_hardcopy_format_pdf permission, set to $guest. This allows professors to turn off hardcopy altogether by setting all the download_hardcopy_format_* permissions to undef. Also change the default permisisonLevel for $guest to -5, to match the permissionLevels for the practiceUsers in defaultClasslist.lst. (It was supposed to be -5 all along.)
Changed paths:
trunk/webwork-modperl/conf/global.conf.dist
trunk/webwork2/conf/global.conf.dist