Merge pull request #51 from strongloop/feature/nan-2.x

Upgrade to nan 2.0.x

Author: raymondfeng

package.json

@@ -25,7 +25,7 @@
     "url": "git://github.com/strongloop/strong-oracle.git"
   },
   "dependencies": {
-    "nan": "^1.8.4"
+    "nan": "^2.0.9"
   },
   "devDependencies": {
     "async": "^1.4.0",