add relay packages/deps/etc

note the proxy allows me to forward traffic through my dev machine to my
graphene server so I don't need to deal with cross site markla

Author: othane

package.json

@@ -2,6 +2,7 @@
   "name": "cata",
   "version": "0.1.0",
   "private": true,
+  "proxy": "http://localhost:8080/",
   "devDependencies": {
     "react-scripts": "0.6.1"
   },
@@ -10,8 +11,10 @@
     "react": "^15.3.2",
     "react-bootstrap": "^0.30.5",
     "react-dom": "^15.3.2",
+    "react-relay": "^0.9.3",
     "react-router": "^2.8.1",
-    "react-router-bootstrap": "^0.23.1"
+    "react-router-bootstrap": "^0.23.1",
+    "react-router-relay": "^0.13.5"
   },
   "scripts": {
     "start": "react-scripts start",