起動の仕方
$ curl -kL https://raw.github.com/pypa/pip/master/contrib/get-pip.py | python
$ pip install virtualenv
$ virtualenv env
$ env/bin/pip install -r requirements.txt
export merchant=XXXXX
export public_key=YYYYY
export private_key=ZZZZ
$ env/bin/python install -r requirements.txt