[evol] updated i18n rake rules for recent ruby-gettext
[doc] updated list of build-depends and depends
[evol] adapted for Rails 2.3.5
[evol] added setup.rb installer, with hooks to generate locales and a 'lib/cyborghood/config.rb' file having a new CyborgHood::Config providing with installation paths, and created CyborgHood::Info to contain software general information (rakefile build-depends are then reduced to the minimum)
[doc] added depends/build-depends info