Added IssueManagement, Licenses, MailingList, Organization and Prerequisities.

Also removed the use of case classes for the domain objects as a) it doesn't really save much boilerplate; b) reduces memory footprint; and c) (and most importantly) I exceeded the 22 field limit imposed on case classes via the Model domain object. Domain objects can often have many properties, and they are also typically anaemic placeholders for data. Thus straight classes make sense here.