* nnet-forward.cc - disable GPU memory caching
* cmvn-to-nnet.cc - add variance flooring
* paste-feats.cc - cosmetic change option description
* train_nnet.sh - import cmvn settings from pre-training
* pretrain_dbn.sh - allow generating input transform from a prototype



git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@3449 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8