grpc - RPC system from Google

	Commit message (Expand)	Author	Age
*	Metadata plumbing and serialization tweaks	Nathaniel Manista	2015-08-31
*	Merge pull request #3126 from nathanielmanistaatgoogle/servicelink-shut-down	Nathaniel Manista	2015-08-28
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\| *	Make ServiceLink shut-down a two step process	Nathaniel Manista	2015-08-28
* \|	Accept addresses rather than ports in add_port	Nathaniel Manista	2015-08-28
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*	Merge pull request #3021 from ctiller/reject-the-stuffs	Yang Gao	2015-08-25
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\| *	Drop whitespace from Python test metadata keys	Nathaniel Manista	2015-08-25
* \|	Add a "transport" field to links.Ticket	Nathaniel Manista	2015-08-24
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*	Affirm metadata transmission in a common function	Nathaniel Manista	2015-07-31
*	Reorganize Python tests	Masood Malekghassemi	2015-07-30