Resolved dependency conflicts found with lein-pedantic. Removed unused dependencies.
Added logging. Fixed NPE in aleph (as reported in the logs) by making sure we always return a status code.

See https://groups.google.com/d/msg/aleph-lib/WgpubH_qSdw/WIzb6fK0v1AJ
Merge pull request #33 from jonase/logging

Logging