update to v1.1.1

- copy both original swf and renamed swf to out dir
run os.walk unicode version, so that path names are passed in unicode
format, and open/write files with unicode encoding.

- note, we'd better run wget with "--restrict-file-names=nocontrol"
  option, so that local file names don't get converted
use BeautifulSoup v4.1.0 rather than v3, it can handle more complicated
html
the script is able to convert hyperlinks in img.onclick javascript event