!!! MerlinMainWindow.java: Basic-whatever-design implemented so far. Still the JTable makes problems with viewing any results from queries. Doesnt work at all atm. I'm pretty pissed...

!!!!!!!!!!!!!!!!! We urgently need a properly working method to convert a ResultSet to an ArrayList or even a proper TableModel so that it fits into that JTable. !!!!!!!!!!!!

Application.java: Added centerWindow() for GUI to center on startup (only works for Windows, not for Dialogs e.g. DatabaseSetup).
DbWrapper.java: getResultOfQuery() now closes Statement after completing any operations referencing to it.
MerlinLogin.java: added private static boolean proceedToNextDialog to indicate whether next dialog should be called or program should be shut down after closing the active dialog / window.
panelRegistration temporarily set invisible.
Bound MerlinLogic.loginToMerlin() into actionPerformed of login button to check input.
Input checkings need to be completed.