Change Button to ImageButton
Created SettingsActivity
Change Button to ImageView
Settings are saved even when the app is closed
Deleted endMenuActivity. Not used anymore.
Improved layout of the game activity

Score needs to be just above the restart/main menu buttons.
Table needs to be centered.
Merge remote-tracking branch 'origin/layout' into feature/settingsActivity

Conflicts:
	app/src/main/java/com/frisodenijs/tictactoe/Game/Game.java
Merge pull request #27 from KB50-G1/feature/settingsActivity

Feature/settings activity