old_contents: destfolder=u"h:\\baiduyundownload"
  hashfile=u"h:\\baidyunindex.tsv"
  srcfolder=u"F:\\BaiduYunDownload"
  maxdays=60
  
  indexfile=hashfile
new_contents: destfolder=u"h:\\baiduyundownload"
  hashfile=u"h:\\baidyunindex.tsv"
  srcfolder=u"F:\\BaiduYunDownload"
  maxdays=60
  picked_size=1024000
  codec_name="gb18030"
  file_ignore_suffix="baiduyun.downloading"
  
  indexfile=hashfile
  
subject: put things to parameters