grpc - RPC system from Google

	Commit message (Collapse)	Author	Age
*	impl	yang-g	2015-08-25
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*	headers reorg	yang-g	2015-08-21
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*	Remove ChannelInterface and replace it with Channel	yang-g	2015-08-19
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*	clang-format all source	Craig Tiller	2015-08-18
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*	merge with upstream	Yang Gao	2015-06-16
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\| *	Update the Status API	Yang Gao	2015-06-16
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* \|	Support sending and showing received metadata in grpc_cli	Yang Gao	2015-06-16
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*	Refactor and add a unit test	Yang Gao	2015-03-27