Merge branch 'model' into 'master'

...galaxytrucker/galaxytruckerreloaded/Model/Map/Planet.java

...ker/galaxytruckerreloaded/Server/Persistence/CrewDAO.java

...alaxytruckerreloaded/Server/Persistence/OverworldDAO.java

...r/galaxytruckerreloaded/Server/Persistence/PlanetDAO.java

...ker/galaxytruckerreloaded/Server/Persistence/ShipDAO.java

...r/galaxytruckerreloaded/Server/Persistence/SystemDAO.java

...ker/galaxytruckerreloaded/Server/Persistence/UserDAO.java

...er/galaxytruckerreloaded/Server/Services/CrewService.java

...laxytruckerreloaded/Server/Services/OverworldService.java

.../galaxytruckerreloaded/Server/Services/PlanetService.java

...er/galaxytruckerreloaded/Server/Services/ShipService.java

.../galaxytruckerreloaded/Server/Services/SystemService.java

...er/galaxytruckerreloaded/Server/Services/UserService.java