* Moved the layer visibility and transparency, from instancerenderer.cpp to layercache.cpp and improved it. Note: Now you can set a instance completely opaque, when their layer is fully transparent or reverse. If both have a transparent value then the result from layer-instance is used.

<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>