A recipe for Fisher and Callhome Spanish

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4547 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
trunk: minor fixes to librispeech recipe; various cosmetic changes to usage messages etc.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4548 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
trunk: newer version of installing sctk

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4549 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
trunk: extending nnet2 scripts to support Viterbi realignment during training

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4550 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8