Remove GPy

gpy_wgp and gpy_mlp are kept, but users won't see them in model factory,
users can still manually import them as regression model if GPy is
properly configured.

Merge pull request #31 from aivarsoo/simmer_saute_refactor

Simmer saute refactor

Update HEBO

v0.3.2, add VCBO and evolutionary algorithm

Change version to 0.3.1

HEBO-v0.3.0