Add generic email trail after sign-up / kick-off

Have signup / kick-off trigger trail of emails (I will provide text!) with generic tasks people can do.

Same day: Have you donated already?
Day 3: This is how you can support on Facebook
Day 5: ...
Day 15: ...

CRM can't do this (stupid system).
And it makes sense and adds value to the crm.

Function: Don't send generic emails from trail after 28th of september 
