Save new users on login
Send emails for: new cards, cards movements
Deliver e-mails with Postmark on production
Add nice defaults
Add Postmark API key
Link to Board absolute URL on e-mails

...otherwise the link won't work!
Supply a default host so that absolute URLs can work
Thanks @exalted for sharing your email address :wink:
Merge pull request #10 from task-planner/mailing