make classes a little easier to use

- add some convenience methods
- make output from Koike.pm configurable.  \r\n is the new default
  line ending.
- add method 'copy' to Koike::Part that returns a deap copy. (a clone)
quick upload for safekeeping/backup/sharing

two files for making parts for a toy telescope.

- cylinderwithbreak_multipass_xoriented.pl is for cutting foam to
  make a space between two cardboard tubing sizes

- telescope_rev_correctkerfed_mult2.pl creates an svg for the laser
  to make the telescope's eye-piece and field-lens positioning.