trunk: adding script that can help debug problems with a lexicon.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4712 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
some minor fixes/improvements in utils; some script changes and fixes necessary for the previous (debug-lexicon) commit

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4713 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
trunk: scoring script change for Switchboard setup.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4714 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
trunk: adding 4gram LM for swbd setup which brings the best GMM number to 18%; also updated the RESULTS file.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4715 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8