Allow for different host/port/scheme configuration for client <--> node.js and drupal <--> node.js communication.

#1997162: fixed minor bug in nodejs.install, hook_requirementsm that appeared after the changes on the way the server responses are tackled

Allow server extensions to register both get and post routes. Allow server extensions to specify routes that should live under the baseAuthUrl or server.js, so they inherit serviceKey checks.

Make sure we pass an account to the auth token functions. Make sure we start a session in the default nodejs_auth_get_token() implementation.

Issue #1974712 by slv_, beejeebus: Refactor functions sending requests to the Node.js server to cope properly with the server responses. Madre http requests logging configurable.

#1405144 by chia: make sure we don't add multiple event listeners for 'message' if there is a socket reconnection.

#1942356: Fixed bug that caused the 'client-message' process to be emitted twice on server.js for each message received on a socket

fix getBackendUrl(), and actually call it from sendMessageToBackend(), thanks amitaibu for the prompting