Test against Clojure 1.5 and 1.6.
Prefix unit test zookeeper paths with /zookeeper-atom-test/.

Also cleans up variable names.
Implement initial values for atoms.
Add test that we can read existing values immediately.
Document all the functions.
Simplify apply calls.
Read with clojure.edn/read-string to avoid code execution.
Reduce package name noise.
Use constantly.
Move debug output into set-value.
Be more idiomatic and move to zookeeper-atom.core namespace.
TIL about iterate.