added notification to model
did schemamigration to model
added sms_sender module
added notification to admin
added vumigo sender code
added vumigo config stuff
fixed wrong import
added notification_sent field to list_display
checking for notification = None
moved vumigo configs to database
added vumigo keys to project
did schemamigration
using database config
fixed broken SMS Sender code
Merge branch 'feature/issue-17-add-notification-to-functionality' into develop