- Moves them to the root of the repo.
- Makes them pass lint (except for the release tag warning).
- Includes the script to rename time.h and string.h in the spec.
- Fixes the #includes in the wrapper files.

Adding a helpful warning message on top of the Makefile and BUILD file.

Refactoring of VS projects, start using nuget dependencies for OpenSSL and zlib on Windows.

dependencies.

Run capable test suites against grpc_unsecure

Fixing dependencies.

Clarify some auth test definitions

Fix the flow control issue.

Grpc ruby add support for returning metadata to the rpc server 

Add SimpleCov coverage set up for gRPC ruby

Refactoring of core security to remove the factories.

- Renamed security_context -> security_connector.
- Credentials are now responsible for creating their own connectors.

Remove usage of xray

- xray was useful during dev testing but is neither a dev or runtime dep
- its presence causes issues for libraries that handle signals themselves

Also
- updates grpc.gemspec with requirements