* Refactor, folding gradient computation into backward pass. Accuracy on tagger seems to be stopping at 60ish percent, indicating bugs. Suspect problems with the word vector initialization.
* Refactor, folding gradient computation into backward pass. Accuracy on tagger seems to be stopping at 60ish percent, indicating bugs. Suspect problems with the word vector initialization.

explosion/thinc,spacy-io/thinc,explosion/thinc,explosion/thinc,explosion/thinc,spacy-io/thinc,spacy-io/thinc