ModelGeometry: add support for shape=0 (cylinder)

[Maciej Komosinski]

As the first step while shape=0 is not yet supported, the source should print an error message and return 0 (or treat cylinder as a cuboid) instead of crashing as it currently does.

Test with:

frams "var m=Model.newFromString(\"//0\np:sh=0\n\"); var mg=ModelGeometry.forModel(m); Simulator.print(mg.sizesAndAxes());" -q

[Maciej Komosinski]

In 262:

Geometry evaluation no longer crashes for models that contain only unsupported cylinder shapes [refs #46]

[Maciej Komosinski]

In 546:

Renamed: Model::buildUsingNewShapes -> Model::buildUsingSolidShapeTypes()
Added class SolidsShapeTypeModel? (for making ball-and-stick Models look like solids-type Models)
ModelGeometryInfo? functions: findSizesAndAxesOfModel(), volume() and area() now accept ball-and-stick Models (using SolidsShapeTypeModel? class)
[refs #46] and possibly closes this issue (needs verification)

[Maciej Komosinski]

Fixed by r546.