Sending confirmation emails on payment confirmation
Merge pull request #658 from NicoleRauch/master

Now the participant page also shows how many spots are available in a re...
Merge commit 'cd6b81d753fa28781ca6fc651b9b293614a05b29'
sending mails re-done
Merge pull request #659 from leider/master

sending mails re-done
Payment reset script.