- experimenting with "readable" conversion to coffeescad code:
 * conversion aims are different from an "evaluated conversion" (losing the parametric aspect in the output code)
 * variables should be kept "as is" : not removed at evaluation time
 * modified the cube primitive module + the expression module (specifically the lookupVariable part) to keep variables as is, and generate a correct output code:
while clunky , it works ! yeah
 * need to try with more complex example, add unit tests etc
- started experimenting with "ad-hoc" conversion of modules (into 'classes' possibly)