add gulp script for minification of JS,and the minification result #177

gulpfile.js

@@ -0,0 +1,16 @@
+var gulp = require('gulp');
+var uglify = require('gulp-uglify');
+var rename = require("gulp-rename");
+
+gulp.task( 'default', [ 'scripts' ] )
+
+// Gulp task to minify JavaScript files
+gulp.task('scripts', function() {
+  return gulp.src('./js/**/*.js')
+    // Minify the file
+    .pipe(uglify())
+	.pipe(rename({suffix: '.min'}))
+	.pipe(gulp.dest(function(file) {
+		 return file.base;
+	}));
+});