Routes narrowed down with except: and only:
Form made look nicer
Opened route for User#show and implement hardcoded author definition better
Create post layout improved
Create / update form improved, find_by_id() => find()
before_action added to Post controller, some clean up, form partial moved to its own place
Create new category form with validations added, error partial made
New category button added
Navigation bar layout improved
Navigation bar improved with Categories dropdown menu, category#show implemented by making post partial
Category title improved by adding category name
Post index header improved by using content_title partial
Links added to category badges in post partial
Added a breadcumb thing in Categories show