Normalize package.json and add missing properties.

Also refactor the properties in a more sane way.

package.json

@@ -1,27 +1,38 @@
 {
-    "name" : "jquery-mousewheel",
-    "version": "3.1.3",
-"description" : "A jQuery plugin that adds cross-browser mouse wheel support.",
-    "main" : "./jquery.mousewheel.js",
-    "repository" : {
-        "type" : "git",
-        "url" : "https://github.com/brandonaaron/jquery-mousewheel.git"
-    },
-    "keywords" : [ "jquery", "mouse", "wheel", "event", "mousewheel", "plugin", "browser" ],
-    "author" : {
-        "name" : "Brandon Aaron",
-        "email" : "brandon.aaron@gmail.com",
-        "url" : "http://brandonaaron.net/"
-    },
-    "licenses": [
-        {
-            "type": "MIT",
-            "url": "https://raw.github.com/brandonaaron/jquery-mousewheel/master/LICENSE.txt"
-        }
-    ],
-    "devDependencies": {
-        "grunt-contrib-jshint": "~0.2.0",
-        "grunt-contrib-uglify": "~0.1.2",
-        "grunt": "~0.4.0"
+  "name": "jquery-mousewheel",
+  "version": "3.1.3",
+  "author": "Brandon Aaron <brandon.aaron@gmail.com> (http://brandonaaron.net/)",
+  "description": "A jQuery plugin that adds cross-browser mouse wheel support.",
+  "main": "./jquery.mousewheel.js",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/brandonaaron/jquery-mousewheel.git"
+  },
+  "bugs": {
+    "url": "https://github.com/brandonaaron/jquery-mousewheel/issues"
+  },
+  "keywords": [
+    "jquery",
+    "mouse",
+    "wheel",
+    "event",
+    "mousewheel",
+    "plugin",
+    "browser"
+  ],
+  "licenses": [
+    {
+      "type": "MIT",
+      "url": "https://raw.github.com/brandonaaron/jquery-mousewheel/master/LICENSE.txt"
     }
+  ],
+  "devDependencies": {
+    "grunt-contrib-jshint": "~0.4.3",
+    "grunt-contrib-uglify": "~0.2.0",
+    "grunt": "~0.4.1"
+  },
+  "readmeFilename": "README.markdown",
+  "directories": {
+    "test": "test"
+  }
 }