Unify package of route_guide service across languages.

php: change routeguide package name

Change route_guide.proto package name and fix build

Update Node verison to 0.11 and status to 'Beta'

Improves test stability

Bumps the ruby version to beta

Fix examples links

Update c++ examples.

Ensure that client generated methods don't conflict with other properties

Add roots.pem to Grpc C# nuget package

Prevent using the hosts cache with a nil address

Remove redundant Node route guide examples

Python Beta codegen.

Adding C++ auth metadata processor.

Grpc ruby server add support for multiple certs

Metadata and serialization for Python

- allows use of multiple credentials, e.g, per servername

The rest of the Python Beta API

Fix gRPC links lifecycle tracking

Drop invoker during test tear-down