Merge github.com:google/grpc into buffer

src/core/iomgr/alarm.c

src/core/iomgr/alarm_internal.h

src/core/transport/chttp2_transport.c

src/csharp/Grpc.sln

src/csharp/GrpcApi/.gitignore

src/csharp/GrpcApi/DummyMathServiceClient.cs

src/csharp/GrpcApi/Examples.cs

src/csharp/GrpcApi/GrpcApi.csproj

src/csharp/GrpcApi/IMathServiceClient.cs

src/csharp/GrpcApi/Math.cs

src/csharp/GrpcApi/MathServiceClientStub.cs

src/csharp/GrpcApi/Messages.cs

src/csharp/GrpcApi/Properties/AssemblyInfo.cs

src/csharp/GrpcApi/RecordingObserver.cs

src/csharp/GrpcApi/math.proto

src/csharp/GrpcCore/.gitignore

src/csharp/GrpcCore/Call.cs

src/csharp/GrpcCore/Calls.cs

src/csharp/GrpcCore/Channel.cs

src/csharp/GrpcCore/ClientStreamingAsyncResult.cs