Migrating bark to Apache Curator.

Squashed commit of the following:

commit 6afda4865828487e30edfcf60ca859cf7938f770
Author: Michael Spiegel <spiegel@addthis.com>
Date:   Thu Mar 27 11:10:10 2014 -0400

    Code formatting and minor changes.

    Eliminate commented out lines. Adding @SuppressWarnings("unused")
    for public API methods.

commit 57ad5b7dfc62c10eaf46f0b4690559961a9d13d8
Author: Michael Spiegel <spiegel@addthis.com>
Date:   Wed Mar 26 14:56:56 2014 -0400

    Bugfixes identified when testing hydra.

commit 4fa23c227cf5b5390977778bac5643f93f17fbe7
Merge: ba804fb b7d56da
Author: Michael Spiegel <spiegel@addthis.com>
Date:   Wed Mar 26 13:22:39 2014 -0400

    Merge branch 'curator' into curator-merge

    Conflicts:
    	pom.xml

commit b7d56da0dd514ffcdccd009f1a825c654afa8cfb
Author: Matt Abrams <abramsm@addthis.com>
Date:   Wed Feb 26 16:12:08 2014 -0500

    - switch to apache curator
    - improve performance of embedded zk tests