[higgins-dev] Minor addition to persona.owl

[Paul Trevithick <ptrevithick@xxxxxxxxx>]

I added a new class called Settings. It is a class to hold setting information for the containing context. Settings are the user's preferences for how to interact with the containing context, as opposed to pure data held by the context. It is expected that contexts that have specific settings will attach them as attributes to an instance of Settings (or some subclass thereof). 

I also added a settings property (domain:Context, value:Settings) to attach a Settings instance to a Context.

Documentation is here:
http://wiki.eclipse.org/Persona_vocabulary

Paul