Update react package to stable release

Summary:
react-native is about to do a branch cut for the next stable release. We want
this version to use a stable release of react so we released one.

This should be the same as the previous alpha. The is mostly changes to DOM / testing and not RN:

https://github.com/facebook/react/commits/15.0.2-dev

AFAIK there are no behavior changes to RN.

I had to add ReactPropTransferer from downstream since this moved out of React Core and into www.

Reviewed By: zpao

Differential Revision: D3245046

fb-gh-sync-id: 7e460315699fd5bff36d89751ce94edb75dd4733
fbshipit-source-id: 7e460315699fd5bff36d89751ce94edb75dd4733

package.json

@@ -124,7 +124,7 @@
     "react-native": "local-cli/wrong-react-native.js"
   },
   "peerDependencies": {
-    "react": "15.0.2-alpha.3"
+    "react": "15.0.2"
   },
   "dependencies": {
     "absolute-path": "^0.0.0",
@@ -187,7 +187,7 @@
     "flow-bin": "0.24.0",
     "jest-cli": "11.0.2",
     "portfinder": "0.4.0",
-    "react": "15.0.2-alpha.3",
+    "react": "15.0.2",
     "shelljs": "0.6.0"
   }
 }