Update task3.py

1. use TextBlob: Simplified Text Processing; 
2. the code show how to load bad_deals.txt, good_deals.txt for generating a training data; 
3. a simple naïve bayes classifier is built on the training data, and it is used for classifying cases in test_deals.txt

e.g.,

...
Shop Best Sellers at ChineseLaundry.com! bad
If you want to change the destination url, please make sure to use http://cj.discountwatchstore.com as the domain. Thanks. good
...

also try other classifiers...