Ready for mergin.
Merged with jingxin.
Merge branch 'master' of https://github.com/psyclaudeZ/ML14-Project into jingxin

Conflicts:
	Code/src/crawler_celebrity_tweets.pyc
	Code/src/feature_normalizer.pyc
	Code/src/tweet_cleaner.pyc
create kmeans
sync feature_normalizer.py
update 05/03
sync crawl.py
test for PCA
delete kmeans.py
multiclass_label added