part/statuslight.scad: holder for AZUB recumbents

part/statuslight.scad: holder for AZUB recumbents

This is a status lights holder for AZUB recumbents (mine is AZUB Apus).
It is supposed to be installed on top of the front derailler tube.
The bottom hole is for speedometer illumination LED, and the rear hole
is for error/status LED.

The front derailler tube is -35 degrees from the horizontal plane,
and the line of sight (for the status LED) is + 15 degrees above
the horizontal plane. It is designed for 3mm LEDs.

This is a quick and dirty work, it is not parametrized enough.
FIXME: It would be better to have the object internal hole as two
cones, each for one of LEDs - it would simplify the LED installation.