--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
make per_feature_regularizer compatible
bug fix so save other files when -f not speficied
cleaner feature mask
Merge branch 'master' into save_best
support invert_hash for multiclass problem
Merge pull request #142 from arielf/master

vw-hypersearch has new option to optimize against test set
Merge pull request #143 from eHarmony/truely_readable

support invert_hash for multiclass problem
Merge pull request #139 from eHarmony/save_best

--early_terminate
Searn bug fix from Alex Hudek
change 1/0 to FLT_MAX
fixed print bug on save_resume
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
random-poly utility for random-noise demo