fixed error
solved #432
basic import for new alumni approach
a little bit of cleanup
removed unnecessary space
email and first link logic
Merge pull request #465 from hpi-swt2/feature/432_student_index

Feature/432 student index
working alumni import flow
registration of alumni addresses available to everyone
Merge branch 'develop' into feature/alumni-import
new email address
Merge branch 'feature/alumni-import' into feature/hpi-email
new email for alumni mailer
sendmail config
hpi email in tests
Merge pull request #473 from hpi-swt2/feature/alumni-import

Feature/alumni import
Merge pull request #474 from hpi-swt2/feature/hpi-email

Feature/hpi email