Add announcement spec
Add announcement migration
Add announcement_users migration
change title column data type
Init announcement model
Init announcement_model model
Add readed_by_user in announcement model
Fix name in announcement rspec
add belongs_to user in announcement_user model
Add user instance in announcement rspec
Init announcements controller
Add announcement user methods in user model
set readed on announcement show page
change answer into answers in local file
Add pagination
Add has_readed? method on announcement model
set read when user create announcement by themself
generate announcement_user after creating announcement
fix title of rspec
Fix has_readed?