mylesmegyesi/clojure.core — pull request #18 by patrickgombert (2014-01-19 06:06:40+00:00)
Title: Introduce PersistentSortedMap. Implements count, lookup, assoc.

Port of the [java version](https://github.com/clojure/clojure/blob/master/src/jvm/clojure/lang/PersistentTreeMap.java)