Add Gruntfile for code style checking and linting

.editorconfig

@@ -12,6 +12,6 @@ trim_trailing_whitespace = true
 [*.md]
 trim_trailing_whitespace = false
 
-[*.yml]
+[{*.yml,package.json}]
 indent_size = 2
 indent_style = space

.gitignore

@@ -5,6 +5,7 @@
 target/*
 .sonar
 .sass-cache
+node_modules/
 
 # Output files
 src/main/webapp/.sencha_backup

Gruntfile.js

+/* jshint browser: false, node: true */
+"use strict";
+
+module.exports = function (grunt) {
+	require("time-grunt")(grunt);
+
+	/* Files matching the following patterns will be checked by JSHint and JSCS */
+	var lintJs = [
+		"Gruntfile.js",
+		"src/main/webapp/app/**/*.js",
+		"!src/main/webapp/app/utils/Ext.*.js"
+	];
+
+	grunt.initConfig({
+		jscs: {
+			src: lintJs,
+			options: {
+				config: ".jscs.json"
+			}
+		},
+
+		jshint: {
+			src: lintJs,
+			options: {
+				jshintrc: ".jshintrc"
+			}
+		}
+	});
+
+	grunt.loadNpmTasks("grunt-contrib-jshint");
+	grunt.loadNpmTasks("grunt-jscs");
+
+	grunt.registerTask("lint", ["jscs", "jshint"]);
+	grunt.registerTask("default", ["lint"]);
+};

package.json

+{
+  "name": "arsnova-mobile",
+  "license": "LGPL-3.0+",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/thm-projects/arsnova-mobile.git"
+  },
+  "devDependencies": {
+    "grunt": "^0.4.5",
+    "grunt-contrib-jshint": "^0.11",
+    "grunt-jscs": "^1.2",
+    "time-grunt": "^1.0"
+  },
+  "private": true
+}