Dev Tooling fixes (eslint/editorconfig) (#1398)

* Add eslint to dev dependancies so it gets installed for the repo

yarn add --dev eslint babel-eslint eslint-plugin-reac

project specific version of eslint, you can globally install eslint-cli
if you want the global runtime, or add .bin to your path

* fix eslint errors about inconsitent returns

* eslint ignore the same as git ignore. allows for eslint .

* Add editorconfig file so everyones editor will be setup to follow the same standards

package.json

@@ -72,5 +72,10 @@
     "webpack": "^2.2.1",
     "websocket.js": "^0.1.7",
     "ws": "^2.1.0"
+  },
+  "devDependencies": {
+    "babel-eslint": "^7.2.1",
+    "eslint": "^3.19.0",
+    "eslint-plugin-react": "^6.10.3"
   }
 }