How to create a module as a 'Class' / Constructor function usable with new - or: How to make require() return a function and not an object

@Gordon, checked. It works - thanks for the nice Christmas gift...

The corresponding export assignment is now:

exports = MOD123;

The module pattern of node.js and your modification implement now also a touch of require.js, which allows to give an application scoped name to a module (or class) to avoid name conflicts. Is require.js' protocol (or a part of it) on Espruino's radar?

With require.js the application code for requiring multiple modules would then look like:

require(['MOD123','OtherModule','OrOther­Class'],function(M123,OtherMod,OtherClas­s) {
    var myM123Instance = new M123();
    var myOtherModInst = new OtherMod();
    var myOtherClassInst = new OtherClass();
  });