Ensemble docs

[tms-bananaquit]

• Something that needs double-checking and/or conversion to git issues is the dev branch's ensemble.py. In particular, I wonder if there's a nice way to do the ensemble.evaluators dict s.t. it hyperlinks to the appropriate functions.
  • On a first sweep, it doesn't look like there's an easy way to include dict members of a specific class with autodoc. Similar approach would be including the functions in a (public) submodule. The docstring could do references to other methods, like, :meth:ensemble.evaluators.eval_simple_majority, which would be similar to the current structure. Might want to fool with the names to be user-friendly.
• The example notebooks (either concept drift and data drift separately, or as a standalone "ensembling" example) should also get some additions.