function identifyFormat(app) {
	if (app.includes("texturepacker") || app.includes("free-tex-packer")) {
		return "texturepacker";
	} else if (app.includes("shoebox")) {
		return "shoebox";
	} else if (app.includes("aseprite")) {
		return "aseprite";
	} else if (app.includes("melonJS")) {
		return "melonJS";
	} else {
		throw new Error("Unknown texture atlas format: " + app);
	}
}
return a string that identifies the texture atlas type
@ignore