#Pathfinder: added still birth workflow

This commit affects only custom m4change reports
fyi, looks like you missed a reference to this:

```
  File "/home/cchq/www/production/code_root/custom/m4change/signals.py",
line 107, in handle_m4change_forms
    _filter_forms(xform, cases)

  File "/home/cchq/www/production/code_root/custom/m4change/signals.py",
line 98, in _filter_forms
    registration_date, False, False)

TypeError: _create_mcct_status_row() takes exactly 8 arguments (7 given)
```