feature: Wukong 4.0.0

Squashed commit of the following:

commit 51c2b1df05cb510a814e22a3cf602c248d03b33c
Author: Travis Dempsey <dempsey.travis@gmail.com>
Date:   Wed Mar 19 17:15:11 2014 -0500

    make all srp wu-versions line up

Change-Id: I58bb3ac3f5f8c43eb70a49f542601950a1f415a2