Prospero-1.36

Eric writes: "Prospero 1.36 includes modified server side scripts. In addition to merging the login.pl and getdoc.pl files, the program now uses session cookies to keep track of authentication. This eliminates the insecure combination of the GET method and usage of crypt() in login.pl. Problems with IE not being able to view documents have been fixed. Conversion of Ariel documents that don't include the NMPG GEDI tag (ie. CISTI documents) has also been fixed."