example training data: data/train_data_40k.tsv format: [query][\t][document]
example test data: data/test_data_clean.tsv [query][\t][document]
build: make
training example: binary/DSSM -train output model to : model/dssm.v2.model
prediction example: binary/DSSM -predict output result to data/test_data.v2.result
evaluation: cd data/ python eval_auc.py test_data.v2.result test_data_clean.tsv