Node pubsub client

Update README.md

Link out to the gRPC protocol description doc in grpc-common

Fixes a missed old module name reference in the interop client

Fixing java package for route_guide.proto

Thread-pool-less construction of GRPC links.

Adding roots.pem from Mozilla and associated logic.

These will be used in generated code in circumstances in which we
don't necessarily want to be asking calling code to have a thread
pool readily available.

Building of Debian packages on Docker

Rename interop_test.c --> interop_test.cc

Adding a CONTRIBUTING file.

Re-generated project files.

Fix a double-close in the server code.

Exposed (I think) now that we properly handle POLLHUP.

Fixing Windows port.

We have many assumptions about languages baked into the test system, and we want this test harness to trigger when testing C++ stuff, so it needs to be written in C++.

Implementing JWT credentials (a.k.a JWT ID Tokens).

Mac networking stack fixes

Fix in tree build of protobuf

If we are building protobuf because of an incompatible out of tree protobuf installation, then make sure that we don't accidentally use that versions includes.

Adding a helpful installation message about protobuf.