GUI:
- Added new icons with faces (the same as in the original minesweeper).
- PlayerGameBoard, MainWindow, NewGameDialog redesigned (e.g. all layout changed to GridBagLayout).
- Method in GraphicsFactory added, so rest of the images can be load + resizes.
- isFlagged added in FieldButton
Merge branch 'master' of https://github.com/nidys/minesweeper

Conflicts:
	src/client/controllers/newGame/GameModeBtnController.java
	src/client/views/NewGameDialog.java