Finalize morphshape and morphishape testing

[Sparks29032]

Issue can be resolved after 0.0.1 release.

• Need to determine behavior at psize for MorphISpheroid. Do we (1) set to zero or (2) divide by characteristic function. Current test data has set to zero, but _spheroidalCF does not set the characteristic function to zero at the boundary.
• Add prolate spheroid test data.

[sbillinge]

closed by #80