Add apply_momentum and apply_nesterov_momentum; Allow updates to be computed for existing gradients; Fully document half of the functions in numpy format
Add apply_momentum and apply_nesterov_momentum; Allow updates to be computed for existing gradients; Fully document half of the functions in numpy format

MihailoIsakov/fishfish,Richi91/nntools,ErnstHowie/Lasagne,gabortakacs/Lasagne,DeanChan/Lasagne,cancan101/Lasagne,kracwarlock/Lasagne,rlkelly/Lasagne,DataFighter/Lasagne-tutorial,mheilman/Lasagne,dnuffer/Lasagne,ebattenberg/Lasagne