make top gau number configurable, skip wav header in transcriber demo

git-svn-id: http://svn.code.sf.net/p/cmusphinx/code/trunk@12672 94700074-3cef-4d97-a70e-9c8c206c02f5
allow both 'threadedScorer' and 'trivialScorer' component names, proper component naming in default config.xml

git-svn-id: http://svn.code.sf.net/p/cmusphinx/code/trunk@12673 94700074-3cef-4d97-a70e-9c8c206c02f5