Expose gulp and typings through npm run scripts to allow using dev dependency

package.json

@@ -10,7 +10,9 @@
   "scripts": {
     "build": "gulp build",
     "test": "gulp test",
-    "prepublish": "typings install && gulp build"
+    "prepublish": "typings install && gulp build",
+    "gulp": "gulp",
+    "typings": "typings"
   },
   "files": [
     "dist"