…g issue with code nested in list in the readme.
…sn't add a `:dev-dependencies` by default. Proof: myself and this guy http://stackoverflow.com/questions/5613977/lein-appengine-prepare-fails/5614279#5614279
If the environment variable APPENGINE_HOME is set, use its value if there is no explicit setting for :appengine-sdk in the project.clj.
…or using entity groups.