Applicant model is now keeping firstname, and
lastname, instead of just full name.

* Redefine model in Applicant to support first, and
last name
* Updated form view accordingly
Had just been enlightened on how the error should
be handled in Express.

 * Followed Express designed, by adding error
middleware to handle the errors. See app.js and
routes/error.js
Created registration form. 

* User's password is encrypted before it saves to 
the computer