Log Message:
Update ruby-classifier-reborn to 2.1.0.

2.1.0 / 2017-01-01

Major Enhancements

* Fix breaking changes in LSI api. Displays errors instead of raising where
  possible. #87

2.0.5 / 2016-12-30 - removed due to breaking change, and no longer available

Major Enhancements

* Stopwords get encoded to utf8 (#83)
* Fix searching issues where no document is added to lsi (#77)
* Added method to add custom path to user-created stopword directory (#73)

Minor Enhancements

* Test newer rubies (#85)
* Fixed errors in README (#68, #79, #80)
* Added an option to the bayesian classifier to disable word stemming (#61)
* Added missing parens and renamed some variables (#59)