完成基本手房租流程。

TODO: 实现流程内部逻辑：数据库处理等。
Replace argument 'req' with 'request'.
Make formbox looks better.
Rename check_authentication to require_auth.

It's shortter and more readable I think. :)
Add model ability to convert to a dict.
Implement basic Charge rent update logic.
Add update_from_dict into database models.
Implement basic create rent, update rent database logic.
Add i18n support in portal.
Add i18n support for model fields name.
Add Created_at in model LandlordRentProfile.
Add pretty_name into models LandlordRentProfile.
Make renter state more readable.
zsj_message_function
zsj_message_function
zsj_bankcards_function
zsj_message_function_repair
Merge pull request #15 from zsjss/master

Implement bank card management, and message center.
Do lots of modifications.

* add initial_data.json for easy testing.
* implement charge rent logic actually.
Merge remote-tracking branch 'origin/master'