see a "new" action for deliverables on project create screen
https://projects.invisionapp.com/d/main/default/#/console/12114617/255156165/preview
Out of the scope of the story: the 'Assignment Due Dates' part of the form
Acceptance criteria:
- When I click on the '+' button, the creation form is displayed
- I can select one Deliverable type
- Size and formats are disabled until you select a Deliverable type
- I can add as many rows as you want for Deliverable items as you want (no validation at the submission)
- I can add as many rows as you want for Publication Information (no validation at the submission)
- I can cancel the creation anytime