Rounded rolling rubber stamp with customizer fields

#### OpenSCAD program to make a stamp that is inked and applied using a quarter turn rolling motion.

jStampRound.scad is an OpenSCAD program that makes a stamp which can be used to print some text, each time it is inked and applied to paper or other media.

#### After you download this program(*), run it using a reasonably recent(**) version of OpenSCAD.

### Setting the text
The text that appears on the stamp is set in the first customizer field. Text size and the length of the stamp surface are set in other fields. Handle height, thickness, and end-radius also can be customized.

### Use a large cylinder radius
Note, this program wimps out and uses linear projection to map text onto a cylinder. This is ok if text width is small compared to cylinder radius. If text width exceeds half the cylinder circumference, some letters will be lost at each end of the text. Anyhow, serious distortion occurs if text width is much more than about 1/4th the circumference. So use a