Following the instructions for 0.5.1, I got this error:
Could not find artifact appengine-magic:appengine-magic:jar:0.5.1-SNAPSHOT in clojars (https://clojars.org/repo/)
I fixed this by changing the :dependencies and :plugins in project.clj to reflect [org.clojars.intronic/appengine-magic "0.5.1-SNAPSHOT"]
Maybe the README.md could by changed to reflect this (Getting Started => Project Setup => point 3), or the 0.5.1-SNAPSHOT can be added to 'appengine-magic/appengine-magic' on clojars.
Could save newbies some time to get started.
Thanks.