added preview

preview/js/app.js

@@ -0,0 +1,35 @@
+// Generated by CoffeeScript 1.3.1
+(function() {
+
+  $(document).ready(function() {
+    var Piskel;
+    Piskel = Em.Application.create();
+    Piskel.mainView = Em.View.create({
+      templateName: 'main',
+      onCanvasClick: function() {}
+    });
+    Piskel.mainView.append;
+    Piskel.Art = Ember.Object.extend({
+      setContext: function(context) {
+        this.context = context;
+      },
+      clear: function() {
+        this.context.save();
+        return this.context.clearRect(0, 0, this.context.canvas.width, this.context.canvas.height);
+      }
+    });
+    $('#main').ready(function() {
+      var context, mainCanvas;
+      mainCanvas = document.getElementById('main');
+      context = mainCanvas.getContext('2d');
+      context.save();
+      context.clearRect(0, 0, context.canvas.width, context.canvas.height);
+      context.fillStyle = 'white';
+      context.fillRect(0, 0, context.canvas.width, context.canvas.height);
+      context.restore();
+      return Piskel.mainCanvas = document.getElementById('main');
+    });
+    return window.Piskel = Piskel;
+  });
+
+}).call(this);