INSTALL file outdated

INSTALL reads:

Things are working well in Rails 2.1.2; so far there are some problems with Rails 2.2.

Download page reads:

You will need: git, Rails 2.3.5 and either Postgres or Mysql and the appropriate gems for your database.

INSTALL reads:
You will also need to install some gems: json_pure, ruby-openid, and cached_model.
    sudo gem install json_pure
    sudo gem install ruby-openid
    sudo gem install cached_model

Download reads:

no mention of those modules.