プロジェクト作成
index.htmlを削除
add haml-rails
creeate mongoid config
add haml layout
bootstrap
set root
add welcome controller
fix layout using haml
add debug
Gemfile

+gem 'twitter_bootstrap_form_for'
+%p=debug session
+%p=debug params
add devise user
add devise views
mv debug to layout
add link_to my/home
add timeline to welcome/index (public page)
add gravatar
separate Guest and Registered.
Guest -> / welcome#index
Registered -> my::home#index
add video_info
+gem 'video_info'
+    signout: "Logout"
+    signin: "Login"
add home
change color
play with gravatar