Import marginalize at the root level

Author: ricardoV94

pymc_experimental/__init__.py

@@ -16,7 +16,7 @@
 from pymc_experimental import gp, statespace, utils
 from pymc_experimental.distributions import *
 from pymc_experimental.inference.fit import fit
-from pymc_experimental.model.marginal.marginal_model import MarginalModel
+from pymc_experimental.model.marginal.marginal_model import MarginalModel, marginalize
 from pymc_experimental.model.model_api import as_model
 from pymc_experimental.version import __version__