add haml-rails to Gemfile and bundle install
add devise to Gemfile and bundle install
$rails g devise:install
add config for devise
$rails g devise user
rake db:migrate
remove public/index.html
add before_filter for authenticate
use sass as the default
rails g scaffold tweets user_id:integer content:string
define routing for root
rake db:migrate
associate tweet with user
reove user_id form
change tweets#create
add link to sign out
remove tweets#show
render new tweet form at tweets#index and remove tweets#new
change redirect path after saving tweet
change default scope of Tweet model