undefided =token method errror
fixed token undifined issue
New user can't follow inviter after invitation
fixed typo 'invitation_toke'
add feature test for user invitation
remove the toke_remove migration
delete migrations
change host to herokuapp
add heroku mailgun settings
set up unicorn and sidekiq
add sentry-raven
add a debelopment pipeline
Merge pull request #7 from springwq/week5

Week5