[] (https://travis-ci.org/b5y/ticket-system)
- tickets, which may contain comments
- ticket can be created with state 'open', can change to 'answered' from 'waiting' or to 'closed' from 'closed', state 'closed' is final (can not be modified or commented)
- create ticket
- change state
- add comment
- get ticket
- Flask
- psycopg2 (without ORM models)
- uWSGI (emperor mode)
- pylibmc (for memcache)