fixing a go docker image build error.

Merge pull request #2887 from tbetbetbe/grpc-ruby-default-timeout-of-infinity-will-clearly-not-suprise-most-users

Sets Ruby's default timeout to infinity.

call grpc_init for GoogleDefaultCredentials

Corrects the way the gemspec refers to various files

Document op completion

health checking protocol doc

Adds grpc.primary_user_agent key during stub creation

Exposes call#peer, channel#target

Eliminated some redundant checks in the Node interop client

Move Python protoc plugin tests to grpcio_test.

Set Python user-agent string.

Implement timeout interop test for Python.

Bounds checking for ops in call batch

Added Sandcastle project to generate C# docs

adding node, ruby, and php to cloud to prod interop tests.

Shutdown lb_policy when changing it

Added invocation of ./config

move auth property iterator declaration into auth_context.h

expose C core version string to C#

Upporting from 0.10 branch.

Improving unprotect doc.

C# Context API

Compression API, sending response headers and cleanup.

Fix gce detection

Fixes problem reading certificates file: They do come with non-ASCII chars (in comments)!