function getImage(image) {
	// force as string and extract the base name
	image = getBasename("" + image);
	if (image in imgList) {
		// return the corresponding Image object
		return imgList[image];
	}
	return null;
}
return the specified Image Object
@memberof loader
@param {string} image - name of the Image element ("tileset-platformer");
@returns {HTMLImageElement} requested element or null if not found