Added book-crossing rst file.
Added book-crossing rst file.

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