feature: Release wukong 4.0.0

Squashed commit of the following:

commit 302fec3921430ba33ef922d1fb722839121dcdb3
Author: Travis Dempsey <travis@infochimps.com>
Date:   Wed Mar 19 16:01:13 2014 -0500

    bump wukong gem

    Change-Id: I16c1828d36ae1c05a5e8f664deba3331652529d3

commit 9a22ab394d4c4d24b411372a0caefd13144d6872
Author: David Snyder <david@infochimps.com>
Date:   Wed Mar 19 15:19:17 2014 -0500

    Fix deprecation warnings when running specs

    Change-Id: I31a2e89f055a647d577c02c09b852f87d57bd7f1

commit 52d9283d3714d64209bc828a0ddce03e6ccaaecd
Author: Josh Bronson <josh.bronson@gmail.com>
Date:   Wed Mar 19 13:18:19 2014 -0500

    fix: resetting registry after hanuman builder tests, and removing geo test

    Previously, about half of the tests were failing when run together
    with Hanuman builder tests.

    Change-Id: I0725464792b475e0af04ac5c750707307d43eb02

Change-Id: I7e65ab309165f285570bebead9ea32c7ffb70ce3
Merge "feature: Release wukong 4.0.0" into rc