the script & instructions are outdated, but they have been updated here:

[WiliTest]

Thanks to thejimbirch the new sript is here:
https://raw.githubusercontent.com/oazabir/GoogleDoc2Html/27a559acedc6384cf204b223913702cedcfda9a9/code.js

The updated instructions based on Google Docs Changes are here:
https://github.com/oazabir/GoogleDoc2Html/pull/1/files