First commit.
bundle exec rails g minimum:omniauth:scaffold.
modify database.yml & routes.rb. rake db:migrate.
test commit.
modify routes.rb & nnect_controller.
routing modify.
modify the top page.
undo config/route.rb
modify application.html.erb.
modify route.rb.
update routes.rb.
update routes.rb.
update routes.rb.
application.html.erb
 & routes.rb update.
ssl is false.
test.
modify routes.rb.
test.
success to twitter login.
Add bootstrap 3.