Committing warning RE HTK conversion.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@1949 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

misc/README.txt

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+
+This directory contains various things: the source and pdf for some
+Kaldi-related papers in papers/ (this does not contain all Kaldi-related papers),
+the Kaldi logo in logo, and some conversion scripts for converting HTK to Kaldi 
+models.
+
+WARNING: the HTK conversion scripts may not work; bugs have been reported.  In
+general, conversion back and forth between HTK and Kaldi is not something we
+recommend doing or something that we aim to support in future.  The problem is
+that HTK and Kaldi have so many differences, both large differences in
+philosophy and small differences in details, that conversion in general is not
+possible, and even where possible, it is probably not a good idea.  If someone
+else wants to keep these scripts updated, we would appreciate that, but the core
+Kaldi maintainers do not view this as a good use of their time.