Allows parallelization of sanity tests, and better error reporting

- grpc ruby 0.9.3 should have released from the release branch but was not
- it needs to be re-released from that branch

- add rubocop as a dev dependency
- fixed many style violations it reported, often using --auto-correct
- add a rubocop config
 - .rubocop.yml shows the exceptions
 - .rubocopy_todo.yml tracks outstanding style issues
- adds a rake task to allow rubocop styling checks to be automated

	Change on 2014/12/01 by nnoble <nnoble@google.com>
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Created by MOE: http://code.google.com/p/moe-java
MOE_MIGRATED_REVID=81111468