redundant cell in example removed
Merge pull request #1692 from EricChiang/master

DOC: OLS Example: redundant cell in example removed
Fix for statsmodels/statsmodels#1689
Merge pull request #1697 from andrewclegg/master

TST: fix test_arima.test_small_data, closes #1689
ENH tools, add standardize transform
TST: fix TestProbitCG by reparameterization, closes #1690
TST: TestProbitCG increase max function calls
Merge pull request #1699 from josef-pkt/reparameterize

TST/ENH StandardizeTransform, reparameterize TestProbitCG closes #1648 closes #1690
STY: Pep-8 cleanup
TST: Failing test. Raises on missing='raise' and no missing.
BUG: Allow missing='raise' and no missing data. Closes #1700
Merge pull request #1701 from jseabold/fix-1700

BUG: Fix faulty logic. Do not raise when missing='raise' and no missing data.
REF: Use fixed params in test. Closes #910.
ENH: add transformation and fit for constraints
TST: add preliminary test for Poisson.fit_constrained
DOC: add try_fit_constrained example file (experimental for OLS and Poisson)
ENH/REF add fit_regularized to Poisson, returns results, with tests for params, bse
TST: add test, tvalues, pvalues, more (2 warnings for no Stata llnull)
ENH: add start_params option
TST fix py3, add start_params to one exampl