Refactor to allow matrix structure in covariance matrices to be exploited
Improve handling of linear algebra issues; add options to fine tune iterations
Fixed typo NOne -> None
Minor renaming and docstring edits
Minor typographical changes
Minor docstring and naming changes, ready to merge
Fix rebase conflict
STY: Pep-8
BUG: Fix refactor victim
Merge pull request #1657 from jseabold/summary2-bug

BUG: Fix refactor victim.
ENH: avoid hard-listed bandwidths -- use present dictionary (+typos fixed)
Update docstring of RegressionModel.predict()

Fixes #1614
TST: add Stata results for SVAR example
TST: SVAR add tests for params and bse
Merge pull request #1643 from kshedden/gee-linalg-refactor2

REF: Allow matrix structure in covariance matrices to be exploited
TST: SVAR add test for llf and information criteria
Merge pull request #1671 from yarikoptic/enh/typos_and_bandwidths

DOC/ENH: avoid hard-listed bandwidths -- use present dictionary (+typos fixed)
Merge pull request #1676 from josef-pkt/tests_svar

TST: Tests for SVAR
Merge pull request #1635 from kshedden/glm_offset5

REF/BUG Allow offset and exposure to be used together with log link, see #1486
Merge pull request #1677 from chatcannon/RegressionPredictDoc

DOC Update docstring of RegressionModel.predict()