grpc - RPC system from Google

	Commit message (Collapse)	Author	Age
*	addressing a few nits	Jan Tattermusch	2018-09-28
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*	C#: allow dot in metadata keys	Jan Tattermusch	2018-08-23
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*	auto-fix most of licenses	Jan Tattermusch	2017-06-08
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*	Add test coverage for Metadata class	Jan Tattermusch	2015-12-11
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*	check for allowed characters in metadata key	Jan Tattermusch	2015-08-28
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*	improving the tests	Jan Tattermusch	2015-08-19
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*	metadata polishing	Jan Tattermusch	2015-08-19