Reduced memory usage of train_test_megam.py. Added --filesonly mode for crossvalidate_megam.py. Made megam_to_libsvm.py ignore TEST/DEV lines.
Reduced memory usage of train_test_megam.py. Added --filesonly mode for crossvalidate_megam.py. Made megam_to_libsvm.py ignore TEST/DEV lines.

ernfrid/skll,ernfrid/skll