add: [logger] adding orders by sending email
fix: [logger] add <title>
add: currency API (using google.com/ig/calculator)

iGoogle 終了後に使えるかわからない
fix: [logger] use utf-8 in scss

see: http://sugamasao.hatenablog.com/entry/2013/08/24/224521
add: open exchange rates API key
change: use openexchangerates.org instead of iGoogle API