clean up docs and add assert for pad
clean up docs and add assert for pad

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