Fix early shutdown

Fix includes for Boring SSL.

Improve C# support in run_tests.py and run C# on Travis.

Stop kicking ourselves

Refactoring std::chrono out.

Renamed make variables for protoc presence and version checking.

A little Makefile spring cleaning

Test client stream cancellation and fix bug exposed by the test.

Flagging some tests as flaky.

Conflicts:
	include/grpc++/completion_queue.h

Attempt to remove the need of calling grpc_init/shutdown in c++ application code

Add a GrpcLibrary class to wrap grpc_init and grpc_shutdown and convert all the tests to init/shutdown free.

Grpc ruby interop fixes

Improving C# server