====== Version Change Log ======
**Version 1.0:** Using sina weiboAPI to craw the data we wanted.

//(Not so effective, need to be authorized but the crawler would not pass sina's examine and verify)//

**Version 2.0:** Using browser’s cookie to login sina. By crawling www.weibo.com, analyzing  the html to get the user’s fellows.

**Version 2.1:** Get user’s tweets by user id which represents by uid.

//(User’s tweets are sealed in javascript and the beautifulsoup can not parse it)//

**Version 3.0:** Using browser’s cookie to login sina. By crawling weibo.cn, analyzing  the html to get the user’s tweets.

**Version 3.1:** Using the weibo search function to search people we wanted and get the tweets.

**Version 3.2:** Using alternative proxies to make sure the crawler could run 24 hours/day.

**Version 3.3:** When get tweets, get all current tweet’s retweet in the same time.

**Version 4.0:** Refactoring the code and making it object-oriented.

**Version 4.1:** Add exception handle.

**Version 4.2:** For speeding up the crawler, use multiple processes to crawl data.

**Version 4.3:** Using multiple sina accounts( which means multiple cookies) to make the crawler run continually.

**Version 4.4:** Exit handle.

**Version 5.0:** Integrating company search list and people search list.