Add Album Cover Placeholder, Update Readme with Node Note (#14)

* Add Album Cover Placeholder
* Updated Readme

README.md

@@ -30,7 +30,7 @@ Lidarr is a music collection manager for Usenet and BitTorrent users. It can mon
 
 * Visual Studio 2015 or higher (https://www.visualstudio.com/vs/).  The community version is free and works (https://www.visualstudio.com/downloads/).
 * [Git](https://git-scm.com/downloads)
-* [NodeJS](https://nodejs.org/en/download/)
+* [NodeJS](https://nodejs.org/en/download/) (Node 6.X.X, NPM 3.X.X Recommended)
 
 ### Setup
 

src/UI/Handlebars/Helpers/Album.js

@@ -5,7 +5,7 @@ var _ = require('underscore');
 
 Handlebars.registerHelper('cover', function() {
 
-    var placeholder = StatusModel.get('urlBase') + '/Content/Images/poster-dark.png';
+    var placeholder = StatusModel.get('urlBase') + '/Content/Images/cover-dark.png';
     var cover = _.where(this.images, { coverType : 'cover' });
 
     if (cover[0]) {