add jshint to gulp..lint and dist

gulpfile.js

@@ -15,6 +15,7 @@ var connect = require('gulp-connect');
 var header = require('gulp-header');
 var pkg = require('./package.json');
 var order = require('gulp-order');
+var jshint = require('gulp-jshint');
 var banner = ['/**',
   ' * <%= pkg.name %> - <%= pkg.description %>',
   ' * @version v<%= pkg.version %>',
@@ -48,10 +49,19 @@ function templates() {
     .on('error', log);
 }
 
+/**
+ * JShint all *.js files
+ */
+gulp.task('lint', function () {
+  return gulp.src('./src/main/javascript/**/*.js')
+    .pipe(jshint())
+    .pipe(jshint.reporter('jshint-stylish'));
+});
+
 /**
  * Build a distribution
  */
-gulp.task('dist', ['clean'], function() {
+gulp.task('dist', ['clean','lint'], function() {
 
   return es.merge(
       gulp.src([