grpc - RPC system from Google

	Commit message (Expand)	Author	Age
*	Merge remote-tracking branch 'upstream/v1.2.x' into HEAD	Jan Tattermusch	2017-04-12
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\| *	Bump version to 1.2.3	murgatroid99	2017-04-07
* \|	Initial migration to new .csproj files	Jan Tattermusch	2017-04-07
\| *	bump version to 1.2.2	Jan Tattermusch	2017-04-03
\| *	Bump version to 1.2.1	Ken Payson	2017-03-28
\| *	bump v1.2.x branch version to 1.2.1-pre2	Alexander Polcyn	2017-03-24
\| *	bump v1.2.x branch to 1.2.1-pre1	Alexander Polcyn	2017-03-20
\| *	Going for 1.2.0	David Garcia Quintas	2017-03-20
\| *	Bump 1.2.x version to pre-2	Ken Payson	2017-03-16
\| *	Introducing 1.2.0-pre1	David Garcia Quintas	2017-03-09
* \|	Bumped version to 1.3.0-dev	David Garcia Quintas	2017-03-09
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*	add C# testing APIs	Jan Tattermusch	2017-02-01