Support saving movie data into database.
Support saving movie data into database.

This is a big change to enable we save data into sqlite3 database. It
provides the features below:

1. A command line interface to execute spider.
2. Save data to database.

Pending work items:
1. Some pages has wrong title: http://movie.douban.com/subject/1421770/
2. Solve the /search/string pages from celebrities.
3. Load history from data on new fetch.

present-corp/feilinn-demo