Inconsistent use of angle and angleDegrees in Workplane

Some of the Workplane functions use the parameter name `angleDegrees`, eg `_revolve`, `revolve`, `rotateAboutCenter`, `rotate`, `twistExtrude`

Whereas some use the parameter name `angle` eg: `polarArray`, `polarLine`, `slot2D`, `ellipseArc`, `ellipse`, `cskHole`, `sphere`,`twistExtrude`

`twistExtrude` is even self-inconsistent: it uses `angleDegrees` as the parameter name and `:param angle:` in the comment.

I suggest `angle` is used throughout, with degrees being assumed.

Redundant extra parameters could be added to preserve compatibility, if desired/required.