setSkin

	public static void setSkin(CraftPlayer cp, String nick){
		GameProfile skingp = cp.getProfile();
		try {
			skingp = GameProfileBuilder.fetch(UUIDFetcher.getUUID(nick));
		} catch (Exception e) {
			cp.sendMessage("§cDer Skin konnte nicht geladen werden.");
			e.printStackTrace();
			return;
		}
		Collection<Property> prop = skingp.getProperties().get("textures");
		cp.getProfile().getProperties().removeAll("textures");
		cp.getProfile().getProperties().putAll("textures", prop);
	}