Move product images to top-level third_party dir

Change-Id: I388616d8dfe8503d2c6d82d4ecc4d4d563599f49

step-1/gulpfile.babel.js

@@ -59,14 +59,24 @@ gulp.task('lint', () =>
 );
 
 // Optimize images
-gulp.task('images', () =>
+gulp.task('images', () => {
   gulp.src('app/images/**/*')
     .pipe($.imagemin({ // DEBUG removed $.cache( before imagemin
       progressive: true,
       interlaced: true
     }))
     .pipe(gulp.dest('dist/images'))
-    .pipe($.size({title: 'images'}))
+    .pipe($.size({title: 'images'}));
+
+		gulp.src('../third_party/images/**/*')
+			.pipe($.imagemin({ // DEBUG removed $.cache( before imagemin
+				progressive: true,
+				interlaced: true
+			}))
+			.pipe(gulp.dest('dist/images'))
+			.pipe($.size({title: 'product images'}))
+}
+
 );
 
 // Copy all files at the root level (app)