Made the Setting class much more customizable by adding the SettingEntry class. Adopted demos to the changes Note: Setting ScreenWidth and ScreenHeight are now combined into ScreenResolution of format <width>x<height> FullScreen and PlaySounds are now of type bool

<HBox opaque='1'>
	<Label name="Title" text="Rio de hola - FIFE 0.3.1"/>
	<Button name="quitButton" text="Quit"/>
	<Button name="aboutButton" text="About"/>
	<Button name="optionsButton" text="Options"/>
</HBox>