Fix Keras install in keras_parikeh_entailment 
Fix Keras install in keras_parikeh_entailment 

The master branch of Keras doesn't work with this example anymore so this pins Keras to version 1.2.2 for this example.
explosion/spaCy,recognai/spaCy,explosion/spaCy,honnibal/spaCy,recognai/spaCy,aikramer2/spaCy,spacy-io/spaCy,spacy-io/spaCy,aikramer2/spaCy,explosion/spaCy,recognai/spaCy,honnibal/spaCy,aikramer2/spaCy,aikramer2/spaCy,honnibal/spaCy,honnibal/spaCy,explosion/spaCy,recognai/spaCy,spacy-io/spaCy,spacy-io/spaCy,spacy-io/spaCy,aikramer2/spaCy,spacy-io/spaCy,recognai/spaCy,explosion/spaCy,recognai/spaCy,aikramer2/spaCy,explosion/spaCy