New cyli, cylo and ring primitives.

[Magnus Forsberg]

I will say right now that I'm not going to support these in LDView's primitive substitution. As such, the only way that I feel they would be acceptable is if they are shortcuts to the existing cyli and cylo primitives. Furthermore, they appear to be rotated 135 degrees, not 45 degrees.

Forcing them to be an alias of the regular primitives would create the very rotation they intend to avoid.