Add directories to package.json

Author: driverdan

package.json

@@ -19,5 +19,9 @@
 , "engines": {
     "node": ">=0.4.0"
   }
+, "directories": {
+    "lib": "./lib"
+  , "example": "./example"
+  }
 , "main": "./lib/XMLHttpRequest.js"
 }