Adds liniting into the workflow (#3082)

* initial linting of src

* fix indent to 2 spaces

* Removes unnecessary rules

* ignore spec folder for now

* Spec linting

* Fix spec indent

* nits

* nits

* no no-empty rule

src/Routers/SchemasRouter.js

@@ -1,7 +1,6 @@
 // schemas.js
 
-var express = require('express'),
-  Parse = require('parse/node').Parse,
+var Parse = require('parse/node').Parse,
   SchemaController = require('../Controllers/SchemaController');
 
 import PromiseRouter   from '../PromiseRouter';