Failing cucumber for author can add committee
Create committee members
Can't validate presence of Booleans
Construct committees
Expose committee composition class methods
Add status to submissions
Add initial submission statuses
Use status for displaying link to add committee

- I could not get link_to_if to work. Leaving it
in commented out for now.
Assign status after creating a submission
Author can add committee
Don't rescue submission invalid transition errors

Probably better to have the app blow up rather than
fail silently.
No need for ternary operation here