removed card and fixed codes style

removed card because it was unnecessary and reworked all classes containing it to implement the change

Projekte/mdga/model/src/main/java/pp.mdga/message/client/ClientMessage.java

@@ -3,8 +3,10 @@
 import com.jme3.network.AbstractMessage;
 
 public abstract class ClientMessage extends AbstractMessage {
+
     protected ClientMessage() {
         super(true);
     }
+
     public abstract void accept(ClientInterpreter interpreter, int from);
 }