Added a redirection to referrer page
referrer redirect

Redirect the page after login to the referrer page
Removed TODO section
Code refactoring of redirect to last URL
Renamed Referer to Referrer
Merge branch 'JahlomP-master'

* JahlomP-master:
  Renamed Referer to Referrer
  Code refactoring of redirect to last URL
  Removed TODO section
  referrer redirect
  Added a redirection to referrer page
Removed zombie.js tests (causing install problems for Windows users)
Dropped _test postfix from test files
Updated User model tests
Updated test for creating a duplicate user
Add additional supertest tests for /signup, /api, /contact and /login
Changed layout title to Hackathon Starter
Placed single sign-in buttons at the bottom of the login form
Update package.json
Updated TO and SUBJECT nodemailer fields on forgot password controller
Code refactoring
Updated TO nodemailer field in reset controller
Add NPM logo, changed npm logo from Base64 to image url
Removed hacker news logo
Updated button text to Change Password