Missing jpegs, uncss

package.json

@@ -21,6 +21,7 @@
     "gulp-ruby-sass": "^0.4.3",
     "gulp-size": "^0.3.0",
     "gulp-uglify": "^0.2.1",
+    "gulp-uncss": "^0.4.5",
     "gulp-useref": "^0.4.2",
     "jshint-stylish": "^0.2.0",
     "main-bower-files": "^2.0.0",