Code enhancments, part 4
Merge branch 'master' of https://github.com/Ziyann/hu_ziyan_minesweeper

Conflicts:
	src/hu/ziyan/minesweeper/controller/MinesweeperController.java
	src/hu/ziyan/minesweeper/model/services/MinefieldService.java
	src/hu/ziyan/minesweeper/view/dialogs/AboutDialog.java