Add: rspec-rails and factory_girl_rails gems
Add: Devise gem and registration views, redirect unless user signed in
Add: slim-rails gem
add feed categories
fix devise strong parameters
add header and footer partials
add category validations
add category errors to form partial
add categories controller tests
Merge branch 'category_controller_tests' into dev
add category model tests
Add: fetch podcast info service, feedjira gem
add verify access categories
add good validators for podcast
add bootstrap-sass gem
refactoring podcasts
bootstrap: categories, podcasts show page, new devise templates
new: fetch podcast service with form errors
edit: podcasts & categories tests
add: feed_items and listened ajax action
add .directory to .gitignore