add MapServer as optional library

git-svn-id: http://svn.zoo-project.org/svn/trunk@404 4b6b6ad6-68b3-4dcc-9231-bd9b83bc5dc3
add irc logs link

git-svn-id: http://svn.zoo-project.org/svn/trunk@405 4b6b6ad6-68b3-4dcc-9231-bd9b83bc5dc3