Upgrade to latest tools.namespace

Upgraded tools.namespace dependency to 0.2.0. As a result also had to upgrade to Clojure 1.3.0.

This is a result of a thread in the clojure mailing list where depending on older version of tools.namespace is causing issues.

https://groups.google.com/d/msg/clojure/Wu8OiLfkmgA/h38rKzTH-MAJ