This version is now fully functional with machineJS. It allows machineJS to train up hundreds of machine learning algorithms, and then ensembler uses even more machine learning to make sense of all those predictions and return a single result.
It is not yet friendly to use for applications outside of machineJS. It could be made to provide automatic ensembling for other projects, but it's not a priority for me right now. I'd love a PR that generalizes this to be useful for everyone!