Rachel's Ada Cooks Project

Bronze complete, code cleaned up and 5 simple tests created. Horray!
Creating a new recipe without ingredients (I don't see a way to add ingredients when creating a recipe either https://www.evernote.com/shard/s58/sh/ec59f3b6-1af1-4237-8e68-ffa95f7e0195/c7d1d35a1ba904f5c4d7495e7de1cefc/deep/0/RachelAdaCooks-(Build-20141110004002).png) will cause this to error with "undefined method `each' for nil:NilClass".