add debug print
add routes with .resouces
add User#show and view
improve testcase of User model
use factory_girl_rails gem
add testcase for user profile page
add factories.rb
forgot add file
rewrite user_page_spec.rb with FactoryGirl
change for pass test
fix testcase
change for test speed
implement sidebar at user profile page
add UserHelper#gravatar_for
add testcase for signup page
implement signup page
add User#create (but temporary implementation)
add User#user_params (private method)
add partial of error messages
fix User#create