ParBoxMorph and ParSrfMorph do not work in Rhino 5

[dcascaval]

These components make use of implementations of the Rhino.Geometry.SpaceMorph class, which was only updated to be thread-safe in the RhinoCommon SDK released with Rhino 6. As such we cannot have multiple Morphs, even with entirely separate data being computed in parallel in Rhino 5 - it results in an immediate race condition and garbled output. The components that use this functionality will not be included in the first release.

As Rhino 6 develops further beyond Rhino 5 in terms of support, stability, and features, a future release may break backwards compatibility.