ludus. Add access to the game type in node impl.
ludus. Move to node to public ludus.

Nodes will be the object children when accessed by a game client.
Move base node to public ludus.
Change to makefile and node impl due to the move.
game_engine. Disable audio playback in test game.
ludus. Changes to object and entity to handle new game tree.

Remove child access nodes that should be part of the node.
Fix to node imple constructor.
Implement child access in entity through the node field.
ludus. Partial changes to ingenium to use new game tree.

Cosmetic change - change root access method from get root to root.
Change the root object to be a node.
This change is part of a bigger change to both ingenium, the load tree and render traverse to use the new game tree.
This change does not compile.