master: merging most code changes from chain branch (but not the actual chain code)-- want to keep shared parts of the code the same.

chain branch: code cleanup, removing unneeded code and options (note: not consistent right now as the --pdf-boudnary-penalty option has yet to be removed from the scripts.  removing ctc code

chain branch: update language-modeling code to prune in a more optimal way (involves rewrite and change in options).  plus various misc. fixes

chain branch: Add randomized thresholding to beta computation for efficiency; changes for efficiency in the NormalizeComponent.

other bug-fixes

ctc: various reorganizations and fixes; adding some test code for nnet-ctc supervision (unfinished); adding some documentation

(trunk) Create a separate kws library. If you are using lat/kaldi-kws.h, change it to kws/kaldi-kws.h.

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trunk: merging sandbox/dan back to trunk.  Includes addition of recipe for the LibriSpeech corpus, and the capability to rescore lattices using ARPA language models that are too big to convert into FSTs.

git-svn-id: https://svn.code.sf.net/p/kaldi/code/trunk@4504 5e6a8d80-dfce-4ca6-a32a-6e07a63d50c8

trunk: changes to feature extraction classes so Compute can be done using a const method (more friendly to multithreaded code).

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trunk: cosmetic fix - compatiable issue of autoconf version prior 2.62 => AC_PREREQ([2.62]) is defined in aclocal.m4 in tools/openfst-1.3.4.tar.gz 

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trunk: merging back VTLN-related changes from branches/complete.  Includes example scripts.  VTLN is now better than baseline (even after SAT), but maybe not by as much as we'd like.

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and python wrapper of dec-wrap in pykaldi

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trunk: thanks to jtrmal, Makefile changes to link only needed libraries; some cosmetic fixes.  also (thanks to dsnyder for testing it): removing the use of weight-regression by default in the speaker-id setup since it causes a degradation.

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trunk: MAJOR COMMIT: Removing deprecated or little-used programs and scripts, which will now reside only in branches/complete

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