Why are spackled scripts copies instead of aliases?

[ExE-Boss]

The spackle.js script generates:

'use strict';

module.exports = require('../<prevYear>/<opName>');

But the repository contains copies of the files.

[ljharb]

Aliases/symlinks behave differently platforms, but also require relative to themselves.

I changed it to use copies so a year’s operations would require sibling operations always from the current year.