add Range subclass of Shape to conform to DAL standards

[pdowler]

CutoutUtil.getPositionBounds(SpatialWCS, Shape) throws an UnsupportedOperationException

ultimately needed for complete IVOA SODA support

possible solution: add the class to the java library to support SODA but don't add it to the model since it isn't needed to describe data bounds?

[pdowler]

this is def. a code feature and not a model feature

[pdowler]

Range class is in cadc-dali
cutout prediction belongs in bifrost
cutout computation using range? depends on the future of caom2 wcs metadata and making sc2soda portable