refactor multiclass out of oaa
add multiclass files in
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
Allow numeric features to be negative, and allow them to be in scientific notation.
The : wildcard for quadratic interactions doesn't seem to work on Mac.  Fixed with stringstreams.
Merge branch 'master' of github.com:mdagost/vowpal_wabbit