added the feature that a client can host a server

- added a class BattleshipServer (a client host a local server) and ReceivedMessage
- edited the NetworkDialog, that a client has a checkbox to select to host a server
-

Projekte/battleship/model/src/main/resources/battleship.properties

@@ -24,6 +24,7 @@ button.connect=Connect
 button.cancel=Cancel
 server.dialog=Server
 host.name=Host
+host.own-server=Host own server
 port.number=Port
 wait.its.not.your.turn=Wait, it's not your turn!!
 menu.quit=Quit game

Projekte/battleship/model/src/main/resources/battleship_de.properties

@@ -25,6 +25,7 @@ button.cancel=Abbruch
 server.dialog=Server
 host.name=Host
 port.number=Port
+host.own-server=Server hosten
 wait.its.not.your.turn=Warte, Du bist nicht dran!!
 menu.quit=Spiel beenden
 menu.return-to-game=Zurück zum Spiel