[FEATURE] add empty folders

app/index.js

@@ -139,6 +139,11 @@ module.exports = yeoman.generators.Base.extend((function() {
 		);
 	};
 
+	Generator.writeDirectories = function() {
+		this.mkdir(this.destinationPath('images'));
+		this.mkdir(this.destinationPath('fonts'));
+	};
+
 	Generator.writeDependencyManagement = function() {
 		this.fs.copyTpl(
 			this.templatePath('_package.json'),