Flask模块化

app
    controller
         shop.py
    model
    service
    utils
    test.py
bitflow.py
static
templates

参考:
http://stackoverflow.com/questions/11994325/how-to-divide-flask-app-into-multiple-py-files
https://github.com/humiaozuzu/awesome-flask
http://dormousehole.readthedocs.io/en/latest/config.html