defensive code


git-svn-id: svn://oss.beweb.dbc.dk/sync_php/php/OpenLibrary/OpenSearch/trunk@77182 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
defensive code


git-svn-id: svn://oss.beweb.dbc.dk/sync_php/php/OpenLibrary/OpenSearch/trunk@77185 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
formatsAvailable added minoccurs=0


git-svn-id: svn://oss.beweb.dbc.dk/sync_php/php/OpenLibrary/OpenSearch/trunk@77186 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
split 3.1 notes to reflect installation


git-svn-id: svn://oss.beweb.dbc.dk/sync_php/php/OpenLibrary/OpenSearch/trunk@77190 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0