Version bump to 2.0.0

CHANGELOG.md

 Omnibus Ruby CHANGELOG
 ======================
-v2.0.0 (Unreleased)
--------------------
+v2.0.0 (March, 12, 2014)
+------------------------
 Major changes:
 - `version` is now `default_version`
 - Added support for multiple software versions and version overrides

lib/omnibus/version.rb

@@ -16,5 +16,5 @@
 #
 module Omnibus
-  VERSION = '2.0.0.rc1'
+  VERSION = '2.0.0'
 end