Added #create action and strong params for creating accounts
Added http basic auth for create account controller
Removed username field from new account form and replaced it with email field.
Removed username parameter from account_params and added email parameter.
Added Account model

* Added validations
  - Account password presence, length, format, confirmation
  - Account email presence, uniqueness, format, confirmation
Added bcrypt gem
Added password encryption
Added Account migration
Added error message output in view
Added sessions controller
Added logic for session creation (logging in an account)
Added account dashboard controller and view

* configured routes and redirects so authenticated users are delivered to a their dashboard upon successful login.
Added login and logout links and method to display depending on account logged in or logged out status.
Changed site title to SEO-friendly SWS title
Added Pet model
Added pet model and created pets migration
Added Pets controller
Added Owners controller
Added Owner model
Added fields to owner migration, added owner nested routes under accounts