topk impl v1
topk testcases
+empty stdout ref
wider diff output for fuzzy compare: -W 200
initializer fix from Zhen, s/--topk/--top/
topk --> top
updated test 31 ref
updated test 31 ref
print holdout loss in final output if enabled
disabled holdout for affix test
reduced number of passes for affix test
side-by-side diff
update ref for 10 passes
-W 150, cleanup
if check out of for loop
typo, autolinnk -> autolink
Merge pull request #192 from agrubb/bugfix-typo

typo, autolinnk -> autolink
fixed merge
fixed merge
fix bug with feature_mask header and options overriding header from initial_regressor