

Refactor `defaults_sparse_params` to only differentiate `layer_params` and `noact_layer_params`. That is, the `sparse` parameter will be implicit in their constriction depending on the `layer_params` given.
numenta/nupic.research,mrcslws/nupic.research,subutai/nupic.research,mrcslws/nupic.research,subutai/nupic.research,numenta/nupic.research