Removing the egs/rm/s4 recipe. It's based on the older generation 's3' recipes, and now there are better examples using free data in Kaldi

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4654 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
Make MMI-model an optional argument.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4656 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
Check graph compatibility with the audio model.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4657 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8