Battle of Britain remake of PSS game CodeSVN

Nothing really

Added pop-up info box for radar stations and airfields.

Added pop-up info box which shows when mouse pointer hovers over a squadron. Info box show name of squadron, number and type of planes, fuel, ammo.
Modified MessageBox to use jTextArea instead of JList.

Message and options windows set always on top.

Message window can be now accessed from within mapa.java class.

Message window is working. Ingame messages can be added and shown in it.

Added options window (for showing radar ranges, opening combat message window etc.).
Added window closing listener to combat message window.

Added combat message window (empty for now). It will show participants and results of all combats.
(Also, closing game window shuts down application - earlier it was still running)

Messages in upper window cleaned up a bit.

Air combat: added combat register. Corrected setting target for squadron (setting target allowed only for squadrons in air, earlier it was possible for squadrons on the ground if they were selected in air first)