Add DropEmAndF1 metric to __init__.py
@@ -11,6 +11,7 @@ from allennlp.training.metrics.bleu import BLEU
from allennlp.training.metrics.categorical_accuracy import CategoricalAccuracy
from allennlp.training.metrics.conll_coref_scores import ConllCorefScores
from allennlp.training.metrics.covariance import Covariance
+from allennlp.training.metrics.drop_em_and_f1 import DropEmAndF1
from allennlp.training.metrics.entropy import Entropy
from allennlp.training.metrics.evalb_bracketing_scorer import EvalbBracketingScorer, DEFAULT_EVALB_DIR
from allennlp.training.metrics.fbeta_measure import FBetaMeasure
