[Urgent] Updated dependencies

* Security fixes for Rack and ActiveSupport
* See CVE-2013-0263 and CVE-2013-1856 for details
Merge pull request #64 from arax/master

[Urgent] Updated dependencies
Revert "[Urgent] Updated dependencies"

This reverts commit 0901cd473ef3f5c2157eab3c764974f65e0978ad.
[Urgent] Updated dependencies - fixed

* Hashie v2.0+ breaks old rOCCI v2.5.x
* Security fixes for Rack and ActiveSupport
* See CVE-2013-0263 and CVE-2013-1856 for details
AMQP
 - update amqp gems
 - simplified amqp handling