call 'ports_named_pairing' in main

    'get_configured_ports' -> 'get_configed_ports_dir'

    new interface with three arguments
    def wiki_pkg_list( install_config_ports, \
         avail_configed_ports, \
         installed_ports ):
code cleaning
rename 'ports_db_path' to 'ports_db_prefix'
typo, comments
fix codingstyle
more fancy codestyling
fix renaming and codestyle
fix NoneType problem
fix an indent mistake
new matching relations

    math is cool
    statisticrealations