some doc


git-svn-id: svn://oss.dbc.dk/sync_php/php/OpenLibrary/OpenOrder/trunk@58803 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
open ver 2.4


git-svn-id: svn://oss.dbc.dk/sync_php/php/OpenLibrary/OpenOrder/trunk@58804 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0
2.4


git-svn-id: svn://oss.dbc.dk/sync_php/php/OpenLibrary/OpenOrder/trunk@58805 30e9dc4a-7611-4fbc-83ba-eecf79b76bd0