Use Notification send_welcome_email.
Fix for sending only notifications without welcome_date; fix saving welcome email.
Put back send_welcome_email & welcome_email routines.
Tidy.
Make sure we only bulk send where welcome_email_sent is null.
Tidy; add send_welcome_email test.
Re-generate assets
correct discription of overall efficiency value
Re-generate assets
Merge branch 'master' into ikmc_project