Fix Lint all the controllers

Fix many undefined variables
Fix many unhandled error calls

controllers/home.js

@@ -1,16 +1,16 @@
-/**
- * GET /
- * Home page.
- */
+var message =
+  'Learn to Code JavaScript and get a Coding Job by Helping Nonprofits';
 
 exports.index = function(req, res, next) {
   if (req.user && !req.user.profile.picture) {
-    req.user.profile.picture = 'https://s3.amazonaws.com/freecodecamp/camper-image-placeholder.png';
+    req.user.profile.picture =
+      'https://s3.amazonaws.com/freecodecamp/camper-image-placeholder.png';
+
     req.user.save(function(err) {
       if (err) { return next(err); }
+      res.render('home', { title: message });
     });
+  } else {
+    res.render('home', { title: message });
   }
-  res.render('home', {
-    title: 'Learn to Code JavaScript and get a Coding Job by Helping Nonprofits'
-  });
 };