Display errors after bad filling game info (alpha version)
and make some layout refactoring.
Fix displaying game name in navbar when game has not been created
Cut down unnecessary games routes
and fix game show layout
Create user model and users controller
Add tests for User model
Fix some slights typos in tests. Run annotate
Ensure uniqueness of user name.
Change localization to PL
Add possibility to create user and all functionality connected with that
Improve error messages and make them fully in PL
User can log-in and would be remembered. Also fit layout
Add log-out (deleting user) functionality
Prevent not logged-in user creating or joining game