Added Nose Tests with Crab.
Added Nose Tests with Crab.

muricoca/crab,hi2srihari/crab,muricoca/crab,Flowerowl/Crab,wnyc/crab,augustoppimenta/crab,rcarmo/crab,imouren/crab,Lawrence-Liu/crab,echogreens/crab,wnyc/crab