another fix to the build system, the current way we check for lib dependencies do not handle lowercase vs. uppercase name differences correctly when using pkg-config. The only lib dependency that currently has this is Xcursor, so i removed the lowercase version so that "Xcursor" will be the only one that is searched for.

<Window title="Credits.">
	<Label text="These guys contributed to FIFE. Man!" />
	<ScrollArea size="400,400" vertical_scrollbar="0">
		<TextBox name="creditText" filename="../../doc/AUTHORS"/>
	</ScrollArea>
	<HBox>
		<Spacer />
		<Button name="okButton" text="You guys rock!"/>
	</HBox>
</Window>