added predict to base learner interface
predict = test_only learn for base learners
cleaned up base learner predict functions
consolidated gd_mf predict functions
added predict to reduction learner
Merge github.com:JohnLangford/vowpal_wabbit
breaking stuff: all reductions now need predict
reductions now have predict functions, but tests break
fixed missing offsets in calls to base.learn
incorporated paul bug fix on base->weights to weights
Merge github.com:JohnLangford/vowpal_wabbit
Merge pull request #226 from jhofman/master

predict for reductions