Add full_title helper
all commit samplea pp
css scss remaked
Add precompiled assets for Heroku
README.md updated.add heroku link
routes.rb updated. link modified
signup page added.
helper modified
add user model. improve validate,etc. (~list 6.20)
６章終了時（メールアドレスの正規表現チェック等）
7章演習前 ユーザ登録実装まで
Add SSL in production(本番環境のセキュア環境設定修正）
Finished sign in.８章演習前終了時点
Finish user edit, update, index, and destroy actions. 9章演習前終了
Add user microposts. 10章終了時点. todo 9章課題一部
add count-letters. wrap too long post.
few bug modified.(when logined, should redirect_to root_path)
modified.
add README.md