Add a way to disable svgmin.

@@ -780,12 +780,15 @@ module.exports = function (grunt) {
             }
             if (mpConfig.images) {
                 var minify = mpConfig.images.options.minify;
+                var svgmin = mpConfig.images.options.svgmin;
                 if (minify === undefined || minify) {
                     copyList.push('imagemin');      // image
                 } else {
                     copyList.push('copy:img');      // image
                 }
+                if (svgmin === undefined || svgmin) {
                     minifyList.push('svgmin');    // image
+                }
                 revList.push('rev:img');            // image
             }
             if (mpConfig.fonts) {