Add #find_by_username_or_email to User
Revert signup and login routes
Add views for signup and login
Add select2 and some css
Refactor roles and tasks
Add views and finish writing the controllers
Add users#show
Change pages title
Improve forms style and add navbar
Fix typo
Refactor users routes
Style navs
Refactor views
Add some json APIs and refactor some controller
Fix edit views
Remove show#user_id
Rename episodes_number to number_of_episodes
Rename episode_number to number
Refactor roles
Fix number_of_episodes and number