* Moved the GLEnable and GLDisable structures from opengl_gui_graphics.cpp to fife_opengl.h as they may prove to be useful elsewhere. * Fixed the color mask definitions in fife_stdint.h * Added the nextPow2() function to calculate the nearest (greater) power of 2 * Removed a bunch of re-definitions of RGB masks * Modified GLImage to only generate one "texture chunk". I hope this makes better use of memory and speeds things up a hair * Made use of the GLEnable structure when clearing the screen

<Panel title="Elevation Editor">
	<HBox>
		<VBox name="Metadata Properties">
		</VBox>
		<VBox>
			<Button name="layerButton" text="Edit Layer"/>
			<Spacer /> 		
			<Button name="closeButton" text="Close"/>
		</VBox>
	</HBox>
</Panel>