playing around with features.
 don't even know.
trying and failing to get a bias term working...
decomposed neural layer.
AffineTransform to complement the NeuralTransform
SigmoidLayer instead of Neural Layer.
Refactoring the transforms...
Merge branch 'master' of github.com:dlwh/epic

Conflicts:
	src/main/scala/epic/parser/models/SpanModel.scala