Merge branch 'develop' into invoice
comments #41 - added invoices to reminders

Signed-off-by: Alexander Skjolden <alex@plastboks.net>
Merge branch 'invoice' into develop
Merge branch 'develop' into event
comments #36 - some missing tests

Signed-off-by: Alexander Skjolden <alex@plastboks.net>
Merge branch 'event' into develop