build: Configure jshint, jsonlint, banan-checker & jscs

Change-Id: Ifab90f787bd2c4d8539698c3828c3486a3559bdb

.jshintignore

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+node_modules

.jshintrc

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+{
+	// Enforcing
+	"bitwise": true,
+	"eqeqeq": true,
+	"freeze": true,
+	"latedef": true,
+	"noarg": true,
+	"nonew": true,
+	"undef": true,
+	"unused": true,
+	"strict": false,
+
+	// Relaxing
+	"es5": false,
+
+	// Environment
+	"browser": true,
+	"jquery": true,
+
+	"globals": {
+		"mediaWiki": false,
+		"OO": false
+	}
+}

Gruntfile.js

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+/*jshint node:true */
+module.exports = function ( grunt ) {
+	grunt.loadNpmTasks( 'grunt-contrib-jshint' );
+	grunt.loadNpmTasks( 'grunt-jsonlint' );
+	grunt.loadNpmTasks( 'grunt-banana-checker' );
+	grunt.loadNpmTasks( 'grunt-jscs' );
+	var conf = grunt.file.readJSON( 'skin.json' );
+
+	grunt.initConfig( {
+		jshint: {
+			options: {
+				jshintrc: true
+			},
+			all: [
+				'*.js'
+			]
+		},
+		jscs: {
+			src: '<%= jshint.all %>'
+		},
+		banana: conf.MessagesDirs,
+		jsonlint: {
+			all: [
+				'**/*.json',
+				'!node_modules/**'
+			]
+		}
+	} );
+
+	grunt.registerTask( 'test', [ 'jshint', 'jscs', 'jsonlint', 'banana' ] );
+	grunt.registerTask( 'default', 'test' );
+};

package.json

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+{
+  "scripts": {
+    "test": "grunt test"
+  },
+  "devDependencies": {
+    "grunt": "0.4.5",
+    "grunt-cli": "0.1.13",
+    "grunt-contrib-jshint": "0.11.2",
+    "grunt-banana-checker": "0.2.2",
+    "grunt-jscs": "1.8.0",
+    "grunt-jsonlint": "1.0.4"
+  }
+}