Added default canvas image

package.json

@@ -1,6 +1,6 @@
 {
   "name": "litegraph.js",
-  "version": "0.3.0-0",
+  "version": "0.3.0-1",
   "description": "A graph node editor similar to PD or UDK Blueprints, it works in a HTML5 Canvas and allow to exported graphs to be included in applications.",
   "main": "build/litegraph.js",
   "directories": {
@@ -20,7 +20,7 @@
   "license": "MIT",
   "files": [
     "build",
-    "css"
+    "css/litegraph.css"
   ],
   "bugs": {
     "url": "https://github.com/jagenjo/litegraph.js/issues"