separated the code to parse html files with embedded wmp, and the code to

separated the code to parse html files with embedded wmp, and the code to
parse asx files. Added a new shortcut "html" to force the "html" behaviour.
Reduced number of false positives for both html and asx files. We now also
trigger on the content of files, since html and asx files are often
autogenerated on the webserver using php or asp.