ENH: Add api for covstruct. Clear __init__. Closes #1917.

closes #1917
On Tue, Sep 23, 2014 at 11:58 AM, Josef Perktold <notifications@github.com>
wrote:

> In statsmodels/api.py:
>
> > @@ -6,9 +6,7 @@
> >  from .regression.linear_model import OLS, GLS, WLS, GLSAR
> >  from .regression.quantile_regression import QuantReg
> >  from .regression.mixed_linear_model import MixedLM
> > -from .genmod.generalized_linear_model import GLM
> > -from .genmod.generalized_estimating_equations import GEE
> > -from .genmod import families
> > +from .genmod.api import *
>
> (by email, trying to recover from temporary power outage but browsers
> don't work properly for github) First, we never do `import *` anymore, it's
> not informative, automatic tools don't work, and I don't see what we have
> added to the api. Second, the content of the subpackage `api` are **not**
> imported into the statsmodels.api. We use them to create the next layer of
> import paths with content that is not entirely in the top level api. See
> `from .stats import api as stats` and similar.
>

It's already gone.