added empty pxnLinks class files

git-svn-id: http://prositemanager.googlecode.com/svn/trunk@65 e374cdb8-7ee8-0d77-fd1e-c554042f9154
added 'portal classes' path

git-svn-id: http://prositemanager.googlecode.com/svn/trunk@66 e374cdb8-7ee8-0d77-fd1e-c554042f9154