Add GetManager to ISphinxContext

[Weetch_Russell (Russell Weetch)]

It would be useful to have GetManager exposed in ISphinxContext so that other Entities added to the Biz.Sphinx model can be managed.

[wlandgraf (Wagner Landgraf)]

If you know ISphinxContext is implemented by TSphinxContext, you can always cast it to TSphinxContext and read its public Manager property:

TheManager := (Context as TSphinxContext).Manager;