removed 'psuedo' records (such like www, mail, ...).
fixed a regexp in child zone search process.
Merge remote-tracking branch 'upstream/master'
make zonename lower case to pick files generated by dnssec-signzone
pick the file namelist.txt at the current directory
Merge pull request #6 from thehajime/master

patch for 1000 queries (qlog-1000)