Fixed obsolete doc.
Added recent MacPorts package installation and upgrade instructions.
Added MacPorts package maintainer.
Merge branch 'master' into release
Merge branch 'master_python2.3' into release_python2.3
Merge branch 'master' into release
Merge branch 'master_python2.3' into release_python2.3
Merge branch 'release' into release_python2.3
Merge branch 'release_python2.3' into master_python2.3