Add initial setup for directory.

• directory serves a single endpoint for both gRPC and http/json
• on this endpoint there is a registration and retrieval method available. (see directory/directoryapi/directory.proto)
• /swagger.json describing the http/json posibilities
• inway automatically registers to the directory
• docker-compose additions to run the directory locally with CA-signed cert
• directory uses a simple json-file backed store for the services so the store survives restarts during development