Use #camelize instead of #constantize.
Use #camelize instead of #constantize.

https://github.com/rails/rails/blob/master/activerecord/lib/active_record/reflection.rb\#L143

Fixes #386.

SpencerCDixon/draper,drapergem/draper,baberthal/draper,mallikarjunayaddala/draper,drapergem/draper,totzyuta/draper,SpencerCDixon/draper,donaldpiret/draper,chuck-john/draper,Bastes/draper,totzyuta/draper,estum/draper,krainboltgreene/draper,chuck-john/draper,turingschool/draper,jianyuan/draper,jianyuan/draper,sideci-sample/sideci-sample-draper,yui-knk/draper,outstand/draper,outstand/draper,drapergem/draper,estum/draper,liwangbest/draper,mallikarjunayaddala/draper,liwangbest/draper,Bastes/draper,yui-knk/draper,turingschool/draper,baberthal/draper