When the Python Interpreter exits, it first attempts to join any
outstanding threads.  This is problematic if a server is created
as a top-level variable or referenced by a reference cycle, as join()
will hang.  This adds cleanup behavior to the server thread's join().

Initial Python3 support

Add a doc for the command line tool

Add support for clang3.5, clang3.7 and gcc4.6  in run_tests.py

PHP: ran php-cs-fixer again

Use == instead of is for cygrpc.OperationType values

Notable Changes:
  -Convert all str types to byte types at cython layer (ascii encoding)
  -Use six for packages that have different names in Python2/Python3
  -By default, unit tests are compiled/run in Python2.7 and Python3.4
  -Ensure MACOSX_BUILD_TARGET is at least 10.7

add a test with empty request

Advertise transport selected in user-agent string

Fix server side memory leak

Add common proto files to Python grpcio-tools

fix for #6834

Add a test for grpc/grpc#6522

fix for issue 6344. added printing of .proto file comments in generat…

Add usage documentation to Python tools distribution

Use Python namespace packages

On receiving an unexpected response, provide the reason in the error message of the returned status

Check the value of Next in async examples

C#: Add unstarted server test

Removed constants kPackageName and kServiceName so multiple services
can be defined in one proto.

Allow servers to select compression level via initial MD & overall compression cleanup

Add support for communication using existing FD (for client and server)

Polished RR policy and added policy doc preamble

Adds functions to set snd/rcv socket buffer sizes.

Factor out json serialization code from qps report.cc

This is for the same reasons as ParseJson, that is so that we can limit
the scope of the proto namespace differences between internal and
external.

added comment about host parameter format (issue 4147)

fix for issue 5548. Deprecated old classes and created subclasses.

moved core_codegen from src/cpp/... to include/grpc++/...

Check content type on the client response path

Fix refcounting algorithm for metadata

Make Metadata.Entry a class

Add interfaces for ServerAsyncReader/Writers