Remove tags from seeds.rb
Change method names to find_by_tag, find_by_category
Add find_by_user method to ChaptersHelper
Add has_many :chapters, through: :sagas to User model
Add find_user_by_tag method
Add 'has_one :user, through: :sagas' to Chapters model
DB seed file fix
Add find_tag_by_user method
Add find_similar_users method; several ChaptersHelper method bug fixes