Prompted by notes from Marcel, I realize that I made a mistake in the patch I did for the VMMaker build scripts. I want to withdraw those update until I can check with Eliot as to how best to handle Cuis underscore assignment characters when loading the plugin from either Cuis GitHub or the separate squeaksource mirror of the Cuis GitHub repository. For this reason I am going to close this pull request. I will cherry-pick the actual C source commits so that these will be available for general use.