updated readme
updated readme

kristenlk/rails_has_many,ryoconnell/rails_has_many,lparvinsmith/rails_has_many,GHolmes04/rails_has_many,ga-wdi-boston/rails_has_many,joebegley15/rails_has_many,lparvinsmith/rails_has_many,kristenlk/rails_has_many,ga-wdi-boston/rails_has_many,joebegley15/rails_has_many,GHolmes04/rails_has_many,ryoconnell/rails_has_many,aemassa/rails_has_many,aemassa/rails_has_many