Gulp - Eslint - Flake8

eslintrc.js can be improved, but working fine
Signed-off-by: Mirko Arena <mirko.arena@gmail.com>

.eslintrc.js

@@ -76,6 +76,8 @@ module.exports = {
         'd3': false,
         'humanize': false,
         'io': false,
+        'moment': false,
+        'Chart': false,
         // Rockstor internal Globals - Backbone models.jslibs
         'Setup': true,
         'Disk': true,

gulpfile.js

@@ -0,0 +1,63 @@
+/*
+ *
+ * @licstart  The following is the entire license notice for the
+ * JavaScript code in this page.
+ *
+ * Copyright (c) 2012-2017 RockStor, Inc. <http://rockstor.com>
+ * This file is part of RockStor.
+ *
+ * RockStor is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published
+ * by the Free Software Foundation; either version 2 of the License,
+ * or (at your option) any later version.
+ *
+ * RockStor is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @licend  The above is the entire license notice
+ * for the JavaScript code in this page.
+ *
+ *
+ */
+
+var gulp = require('gulp');
+var eslint = require('gulp-eslint');
+
+
+gulp.task('lint', lintJob);
+gulp.task('default', ['lint']);
+
+function lintJob() {
+
+    var jssrc = 'src/rockstor/storageadmin/static/storageadmin/js/';
+    var jsfiles = [
+        'license.js',
+        'socket_listen.js',
+        'rockstor.js',
+        'rockstor_widgets.js',
+        'rockstor_logger.js',
+        'paginated_collection.js',
+        'router.js',
+        'graph.js',
+        'd3.slider2.js',
+        'models/models.js',
+        'views/common/*.js',
+        'views/*.js',
+        'views/pool/**/*.js',
+        'views/dashboard/*.js'
+    ];
+    jsfiles = jsfiles.map(function(element) {
+        return jssrc + element
+    });
+
+
+    return gulp.src(jsfiles)
+        .pipe(eslint('./.eslintrc.js'))
+        .pipe(eslint.format())
+        .pipe(eslint.failAfterError());
+}