Hi, the plugin is quite helpful. But I may find a bug in function `getImageUrl`, about the regular expression `/url(?:\(['"]?)(.*?)(?:['"]?\))/gi`. It can't match the background file that include brackets in file name, because of its ungreedy matches. 
Hi, the plugin is quite helpful. But I may find a bug in function
getImageUrl, about the regular expression/url(?:\(['"]?)(.*?)(?:['"]?\))/gi.It can't match the background file that include brackets in file name, because of its ungreedy matches.
