react-native-cli initial commit

A cli package that is responsible for:
* starting a new react-native project
* forwarding all other commands to a cli module in react-native
* currently cli.js knows how to start the webserver, in the future it may do things like build the app etc.

react-native-cli/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "react-native-cli",
+  "version": "0.0.0",
+  "description": "The ReactNative cli tools",
+  "main": "index.js",
+  "bin": {
+    "react-native": "index.js"
+  }
+}