Created Assessment MVC

+ Created utility object, assessment
  + Assessment can access traitify API to generate assessment_id
  + Assessment ID can be passed to current_assessment
  + Assessment show view can be accessed through home#index view
+ Fixed devise customization functionality (email and username)
  + Devise user can be authenticated via username instead of email
  + User can have both username and email attached
  + Devise routes/views generated
  + Devise form partial added for sign in and sign up
Updated Assessment structure

+ Fixed logic for M&C
  + Updated routing path
+ Added Traitify JS widget to assessments#show view

+ Added Foundation to app
  + Added navigation bar w/ dropdown to application layout