* Tries to match user account from list of emails in Github API
Requests the 'user:email' scope from Github which returns the private
emails associated with the user's account.
* Centres GitHub button in layout
* make login a seperate page
* make signup a another page
* get previousPath
* setPreviousPath between routes
* new desig for login pagen
* new design for signup page
* added login and exit icons
* added signup and exit icons
* refactor form-container.scss
* deleted extra code