Added constructors for rendering and update messages.
Modified DefaultKeyboard's configuration call to set the controller flag of compute nodes to false.
Modified configuration handler to make calls to the new configuration methods in ApplicationDelegate.
Added a message Type for UpdateResponse to Message.
Modified logger to send its start-up sequence messages to the log queue instead of directly to the console.
Modified Configurable RayTracer to call back on the scene stored in UpdateData.
Added various constants.
Modified Launcher in preparation for file based configuration. Nodes now default to headless compute nodes on start up unless otherwise configured.
Added a new configuration API to ApplicationDelegate that allows on-the-fly reconfiguration of a node without needed to restart.
Added a network renderer that distributes rendering to compute nodes.
Implemented a handler for update requests.
Implemented a handler for responses to render requests.
Implemented a handler for render requests.
Implemented a handler for responses to update requests.