prevent infinite loop by not resending received pixls.

js/pixl/index.html

			var screen_pos = pixl.to_screen(pos);
			pixl.ctx.fillRect(screen_pos.x, screen_pos.y, pixl.size, pixl.size);
			pixl.world[pos.x + "," + pos.y] = {};
			if (pixl.online) {
			if (pixl.online && !pos.remote) {
				pixl.ws.send(JSON.stringify([{x: pos.x, y: pos.y, color: color || "black"}]));
			}
		}
				var obj = JSON.parse(msg.data);
				if (obj.length !== undefined) {
					obj.forEach(function(p) {
						p.remote = true;
						pixl.world[p.x + "," + p.y] = {color: p.color};
						pixl.draw_pixl(p, p.color);
					});