--prefix=<destination_dir>  (default: /usr/local)
--bindir=<bin_dir>  (default: /bin)
--locale=<locale_dir>  (default: /share/locale)
--pixmaps=<pixmaps_dir>  (default: /share/pixmaps
--desktop=<desktop_dir>  (default: /share/applications
--ruby=<ruby_dir>  (default: /lib/site_ruby/1.8)

--enable-gtk2  (install the gtk2 frontend)
--enable-cli  (install the cli frontend)
--enable-lang-all  (install all locale files)
--enable-lang=<xx>  (install specific locale file, separate with a comma)

--update-lang  (updates the locale files)
--update-lib (resets file locations in ruby files)