function unpackSpritesheetV1(root, path, data, image, meta) {
	for (var id in data) {
		if (id === '_type' || id === '_meta') continue;
		var subData = data[id];
		var subPath = getFilePath(path, id);
		if (subData._folder) {
			unpackFolder(root, subPath, subData, id, image, meta);
		} else {
			unpackSprite(root, subPath, subData, id, image, meta);
		}
	}
}
@param {Object} root - an object where to unpack the spritesheet data
@param {Object} data - the raw JSON spritesheet data
@param {Image}  image - spritesheet image