[Thuban-list] Further work on extensibility

[Jan-Oliver Wagner]

Hi,

I just checked in some further experimental code to handle
extensions for Thuban. I introduced a new type Extension
of which can many be part of a Scenario. An extension
can have a list of Objects which are to be defined by your
application-ontop-thuban.

The sample code will eventually show up as part of GREAT-ER,
the first Thuban-extending Application.

Remind that the concept has not yet settled and is pontially
subject to change. Discussion is welcome of course.

	Jan

-- 
Jan-Oliver Wagner               http://intevation.de/~jan/

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