Fix validation for password confirmation in sign-up form.
Fix specs regarding password confirmation mismatch.
Add missing translations for Devise views.
Add API resource for creating users.
Hide form on successful sign-up.
Add pending tests for sign-in and sign-up events.
Pass the error response of a sign-up to the view to display it.
Merge branch 'signUpBackend' into prototype
Pass sign-in error response into login view.
Prepare showing message for a successful sign-in or sign-up.
Fix frontend routing when tabs in login view are clicked.
Rename identifiers for login view panes to match wording in user router.

+ This is no functional change but for easier understanding, hopefully.
Toggle menu item text between "sign-up" and "edit account".

+ Resolved ticket #68.
Rewrite URLs when the user signs in or signs out.
Merge branch 'feature/toggleSignUpEditAccountMenuItem-68' into prototype
Refactor passing the user name into the view.
Fix typo.
Add missing products in frontend.
Add a simple phone number validator.
Add a simple phone number editor in the backend.