trunk: various minor unrelated fixes.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4659 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
trunk: fix to prvious commit (script error).

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4661 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8
trunk: adding fix to ignore lines becore /data/ section in Arpa format LM

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4663 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8