added classes for client and server state machine

- a client state machine consits out of a 'ClientState' (every state of the machine) and a 'ClientStateMachine' (every state, which consists out of states), the machine starts with the ClientAutomaton
- analog for server
- started to implement logic for the server, transition from 'Lobby' to 'GameState'

Projekte/mdga/model/src/main/java/pp.mdga/client/Statistics.java

@@ -0,0 +1,4 @@
+package pp.mdga.client;
+
+public class Statistics extends ClientState {
+}