Remove unimplemented routes
Check user is logged in before creating article
Authorization tests
User must be logged in to create new articles
Add bootstrap-sass
Extract navigation bar to partial
Merge view and display articles features
Extract header to partial
Bootstrap style the nav bar
Bootstrap style the login form
Bootstrap style the new article form
Validate presence of title and text
Better flash message display
Display success message after creating article
Merge branch 'bootstrap'