Merge branch 'release/0.12' into develop
デバッグ用コードを削除(develop)
ファイルを更新(feature/design)
some updated(feature/design)
updated(feature/design)
navi_area(feature/design)
media_area and media_btn(feature/design)
navi label(feature/design)
url_forのルート名を変更(develop)
updated(feature/design)
デザイン適用(feature/design)
Merge branch 'feature/design' into develop

Conflicts:
	templates/recipe/start.html.ep
id finished の位置を変更(develop)
css修正(develop)
footerに.clearbothを追加．app.cssをupdate(develop)
同じchannelをリクエストするボタンをdisabledにした(develop)
version++(release/0.13)
Merge branch 'release/0.13'