Adding RNPM config

Author: lostintangent

package.json

@@ -18,7 +18,20 @@
   "dependencies": {
     "code-push": "1.8.0-beta"
   },
-  "devDependencies": {
-    "react-native": "0.19.0"
+  "peerDependencies": {
+    "react-native": ">=0.19.0"
+  },
+  "rnpm": {
+      "android": {
+          "packageInstance": "new CodePush('${androidDeployment}', this, BuildConfig.DEBUG)"
+      },
+      "ios": {
+        "sharedLibraries": ["libz"]  
+      },
+      "params": [{
+        "type": "input",
+        "name": "androidDeploymentKey",
+        "message": "What is your CodePush deployment key for Android"   
+      }]
   }
-}
+}