view db/migrate/044_set_language_length_to_five.rb @ 1087:74407a04925c issue_540

* (publication.rb) - fixed the acts_as_activity query (see diff to previous commit) - not returning duplicate results any longer; added the visible scope to the publication model;
* (init.rb) - created a new public permission - view_publication.

class SetLanguageLengthToFive < ActiveRecord::Migration
  def self.up
    change_column :users, :language, :string, :limit => 5, :default => ""
  end

  def self.down
    raise IrreversibleMigration
  end
end