Add forever.js to package.json, closes #74

package.json

@@ -27,6 +27,7 @@
   },
   "dependencies": {
     "canvas": "1.1.6",
+    "forever": "^0.13.0",
     "jade": "~1.8.2",
     "lwip": "0.0.6",
     "mime": "1.2.11",