Bootstrap form rails added.
Questions sidebar refactored.
New Devise sign in form.
New question#index view.
new question#create view.
New answer#create view (question#show page), fill_in select by #id.
New navbar.
specs refactored. :)
Edit questions.
Questions controller tests fix: it shall pass only under user.
Comments model added.
Totally reworked UI for answers and comments.
Ajax comments.