As an Owner, I can assign Users to the standard Roles

(User Story, Closed -> Fixed, Priority: High, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Access Control
Summary: This should initially happen in Sharing and Security: for each Member, I can easily set which Role they have.
The first step of this is to define the standard Roles. See this discussion for thoughts on what those should be.