only perform first order transform if total UNIQUE words is greater than 1
only perform first order transform if total UNIQUE words is greater than 1

https://github.com/cardmagic/classifier/pull/19

kreynolds/classifier-reborn,sanbiv/classifier-reborn,MadBomber/classifier-reborn,jekyll/classifier-reborn,MadBomber/classifier-reborn,kreynolds/classifier-reborn,sanbiv/classifier-reborn,jekyll/classifier-reborn