Integration with custom message in workflow as well as handle notify users on changes to workflow, taskgroup, task states, etc.
Also fixed email notification rule, issue, Changed task group status change is sent to WF owner instead of task group contact
Merge remote-tracking branch 'origin/feature/custom_workflow_message_email_override' into feature/email_notification_wf_start_fix
Emails for WF starting in 3, 7 days, as well as message.html for emails (not digest) to support HTML in Start Workflow message
Merge pull request #1563 from reciprocity/feature/email_notification_wf_start_fix

Email notification changes for workflow starting in 3, 7 days