Clojure and contrib example
Make examples more self-contained

- Also improve error handling without resorting to `set -e`
Update to datomic-free 0.8.3767 and clojure 1.5.0-RC4
Update Datomic free to 0.8.3784
Add an update of Clojure to the clojure-and-contrib example, to exercise the transactor
Update clojure and datomic.
Update Clojure and Datomic
Update Clojure to 1.5.0-RC17 and Datomic to 0.8.3826
Update to Clojure 1.5.0
Update Clojure to 1.5.1 and Datomic to 0.8.3843
Clean before creating uberjar in clojure-and-contrib example
Update to Datomic 0.8.3861
Update to Datomic 0.8.3862
Merge branch 'master' of https://github.com/Datomic/codeq

Conflicts:
	project.clj