update SDLMain.m/.h to latest version rename cNearBlackColor to cNearBlackColorChannels for readability merge tunsetborder.inc in uLandGraphics.pas

foreach(dir
	Default
	Classic
	Mobster
	Pirate
	Robot
	Russian
	Singer
	Surfer
	)
	add_subdirectory(${dir})
endforeach(dir)