part 1 done
Merge branch 'master' of https://github.com/cc26/data-science-yelp

* 'master' of https://github.com/cc26/data-science-yelp:
  add
  add
  add new graph
  train 7500 test 2500 lowcount 5000 found_biased_business
  part2 graph
  added review as feature
  add some feature remove review
  writeup
  added part2