Update: AccountType.java (moved to package "ENUMs")

Update: MapType.java (moved to package "ENUMs")
Update: Persistence.java (removed obsolete method)
Update: PlayerAccount.java
Update: RuntimeInfo.java (added fields for thread status-updates and messages + fields for tracking stats during game)
Update: ThreadStartup1.java (renamed StartupThread.java to ThreadStartup1.java)
Add: ThreadStatus.java (ENUMs to reflect current status of a thread)
Add: ThreadUpdateMaps.java (thread for updating core-maps)
Add: ThreadStartup2.java (thread for loading player-account and player-statistics at startup)