updating path in default.cfg and refactorings
note about external LM no underscore in names
minor fix export models
Separate voip_cs and hclg/models

Online update and other model scripts use local
AM, matrix, phonetic tree in hclg/models

Plus various bug fixes
mfcc.conf also separated to hclg/models
Updates to models' paths.
build_hclg copy mfcc, silence to output dir

So the output dir contains all files
necessary for decoding with Kaldi decoders
Added matrix to build_hclg.sh

So all files necessary to decoding are in output dir
Fixing default paths.
Merge branch 'fix-kaldi-config-path'