Adds ruby versions of the interop server and client

- Adds the service and message classes generated from beefcake and a patched proto compiler
- Adds an interop client that uses these service and message classes
- Adds an interop server that implement the service description

TESTED interop client works with the interop server
	Change on 2014/12/08 by temiola <temiola@google.com>
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=81615139