Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit
--save_best_model based on holdout loss
add --save_no_win arg for early stopping
Merge branch 'master' into save_best
Merge branch 'master' into save_best
make it work for gd
holdout valid and early terminate for bfgs
test update for bfgs and clean up
Merge branch 'master' of git://github.com/JohnLangford/vowpal_wabbit
ariel: rewrite + refactor + bug-fix Paul Mineiro's hypersearch for general usage.
utl/vw-hypersearch: if no progress assertion is met, terminate more gracefully.
utl/vw-hypersearch: neater print at flat-line condition
Merge pull request #140 from arielf/master

Paul Mineiro's hypersearch for general usage + enhancements + bug fix
make per_feature_regularizer compatible
bug fix so save other files when -f not speficied
update build to use zlib-1.2.8
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
cleaner feature mask
Merge branch 'master' into save_best
better error handling and user friendly error messages