Add script term-weight.py, computting term-weight for query/bidword.
Add script term-weight.py, computting term-weight for query/bidword.

SnakeHunt2012/word2vec,SnakeHunt2012/word2vec,SnakeHunt2012/word2vec,SnakeHunt2012/word2vec,SnakeHunt2012/word2vec