increased test code coverage except for the unstable versions
increased test code coverage except for the unstable versions

ChadFulton/statsmodels,bashtage/statsmodels,bashtage/statsmodels,statsmodels/statsmodels,josef-pkt/statsmodels,ChadFulton/statsmodels,josef-pkt/statsmodels,josef-pkt/statsmodels,statsmodels/statsmodels,ChadFulton/statsmodels,jseabold/statsmodels,josef-pkt/statsmodels,statsmodels/statsmodels,jseabold/statsmodels,ChadFulton/statsmodels,jseabold/statsmodels,statsmodels/statsmodels,josef-pkt/statsmodels,bashtage/statsmodels,bashtage/statsmodels,jseabold/statsmodels,bashtage/statsmodels,ChadFulton/statsmodels,statsmodels/statsmodels,josef-pkt/statsmodels,statsmodels/statsmodels,jseabold/statsmodels,bashtage/statsmodels,ChadFulton/statsmodels