Added None as an activation type
Added None as an activation type

JesseLivezey/sklearn-theano,alexchao56/sklearn-theano,HRZaheri/sklearn-theano,eickenberg/sklearn-theano,arnabgho/sklearn-theano,kastnerkyle/sklearn-theano,eickenberg/sklearn-theano,alexchao56/sklearn-theano,kastnerkyle/sklearn-theano,bssrdf/sklearn-theano,JesseLivezey/sklearn-theano,HRZaheri/sklearn-theano,sklearn-theano/sklearn-theano,yaoli/sklearn-theano,arnabgho/sklearn-theano,yaoli/sklearn-theano,bssrdf/sklearn-theano