BUG extra dimension, missing ravel in emplikeAFT closes #917
TST lowess avoid edgecase, increase precision
Merge pull request #918 from josef-pkt/fixes10_emplike_lowess

Fixes10 emplike lowess
Updated summary for OLS
Cleaned up division by using np.divide)
Added test for rsquared_adj and fixed parentheses error in actual function.
Test file passes pyflakes now.
Catching warnings
Merge pull request #919 from guyrt/ols-summary-crash

Ols summary crash with k_vars > nobs closes #868