Add server module that can receive command over the network

[ewjmulder]

The audio-streaming module can run inside a JVM and controller directly from there. It would also be nice to be able to run immerse as a network service that can be controller from the network.

[ewjmulder]

Nice ASCII art for Spring Boot:

   ___                                        
  |_ _|_ __ ___  _ __ ___   ___ _ __ ___  ___ 
   | || '_ ` _ \| '_ ` _ \ / _ \ '__/ __|/ _ \
   | || | | | | | | | | | |  __/ |  \__ \  __/
  |___|_| |_| |_|_| |_| |_|\___|_|  |___/\___|

[ewjmulder]

Actually, this requirement has been changed to minimize CPU / Memory overhead and minimize extra dependencies. So no Spring boot, but a simple TCP Client / Server with JVM serialization.

[ewjmulder]

Done with nice clean RMI style client / server with serialization.