Added support for the Standard Edition and the Professional Edition of Poseidon for UML to the port.
It is possible to switch the edition using the knobs
POSEIDON_SE=yes for the Standard Edition or
POSEIDON_PE=yes for the Professional Edition.
The download mechanism also changed. The packages will be fetched automatically from Gentleware's FTP server from now on.
(with some hack around DISTNAMES to make portlint happy)