adds .rvmrc file so when we are in this dir in the shell, RVM will
automatically switch to the correct ruby and gemset, ruby-2.0.0-p0@rails4
added to gemfile and bundled...
ran $ rails generate devise:install
docs - http://devise.plataformatec.com.br/#starting-with-rails
ran $ rails generate devise member
http://devise.plataformatec.com.br/#starting-with-rails
creates Members controller so we can move strong params from devise model
removes old attr_accessible since we moved to controller's strong_params
rdbm...