Merge pull request #35 from xHFT/invete_nonapp_user

Invete nonapp user
Merge pull request #36 from xHFT/invete_nonapp_user

raise 404 error when the event removed the invited email user
Merge pull request #37 from xHFT/invete_nonapp_user

check the email is valid
Merge pull request #38 from xHFT/invete_nonapp_user

fix send message error
change default mail sender
Merge remote-tracking branch 'origin/dev' into dev
change the user_can_view method