Static pages tests refactored - shared examples.
Written test for correct placement of links in layout.
Test for full_title function, which is now used in tests for static pages instead of redundant copy of it.
User model added.
User validation.
Bcrypt added.
User model updateted with secure password.
Exercises for chapter 6 done.
Dodanie FactoryGirl, devel user page.
Poprawka literówki.o
Finish user signup.