Geometry support for multipoint control surface motion

[kejacobson]

At different flight conditions, control surface positions or other geometry changes may be needed for each scenario. We need to be able to support this.

One possible approach is to create a separate instance of the geometry in each scenario. This is the simplest approach but may lead to duplication of some computations on the non-moving surfaces.

An alternative approach is to have one main geometry parametrization component and pre-coupling geometry components in each scenario that adjust the moving surfaces.