as a member, I can create a task related to a project, deliverable set, deliverable, source/asset

the user must have write access on the object the task is bound to (LM will need to see how this goes. need to see if too restrictive).

a Task has:
title
creator
assignee(s)
due date
attachments(s) (is a link to an existing document)
states include:
to-do
In progress
Done
Trash