added predict to base learner interface
predict = test_only learn for base learners
cleaned up base learner predict functions
consolidated gd_mf predict functions
nn reduction composition bugfixes (not backwards compatible)
Merge pull request #220 from hal3/master

fixed memory leaks
tweak movielens demo
make test pass
tweak movielens demo
merge upstream master
Merge branch 'new_new_upstream_master' into nnfixes
tweak alignment code in parse_args.cc and revert bs test changes
tweak movielens demo
Merge pull request #221 from pmineiro/nnfixes

nn reduction composition bugfixes (not backwards compatible)
limit to 8 way parallelism in make
Merge branch 'master' of github.com:JohnLangford/vowpal_wabbit
demo tweaks
Merge pull request #222 from pmineiro/nntweak

demo tweaks
Add --progress <arg> support
--progress <arg> option support: fix all dump_interval updaters.