TST: increase precision for tsa.pacf_ols
TST: lower precision for normality tests, see #1113
TST lower precision in test_pca_svd closes #1113
    (lowering all by one, I cannot check)
ENH: add MNLogit loglike_and_score
ENH: mle lbfgs now uses simultaneous loglike and score, tested with MNLogit
MAINT: change default maxiter to match docstring
MAINT: do not tell lbfgs to approximate the gradient if we are already passing it a score function
MAINT: restore approx_grad flag superpowers
Merge pull request #1161 from argriffing/mnlogit-loglike-score

add a fitting interface for simultaneous log likelihood and score, for lbfgs, tested with MNLogit
Merge pull request #1157 from josef-pkt/tst_precision_master

TST: Fix precision in some tests. Closes #1113.
fix typo

disambiguation dilemma between "sauce" and "source"
BLD: do not install *.pyx *.c  MANIFEST.in
MAINT: Sort backports to make applying easier.
Merge pull request #1202 from jseabold/sort-backports

MAINT: Sort backports to make applying easier.
MAINT: Fix last commit.
Merge pull request #1200 from josef-pkt/fix_manifest

BLD: do not install *.pyx *.c  MANIFEST.in
TST: getting started with test against Stata
REF: wire robust covariances into RegressionResults
ENH/DOC: robustcov, add cluster (not tested), add to docstring
ENH: add Warnings to compare_lr_test and compare_f_test if nonrobust cov