1.6.3:
  * Generate md5sum checksums for distributed files
    Changed files: Makefile
  * use "startswith" string method instead of a regex
    Changed files: linkchecker, linkcheck/UrlData.py
  * Add a note about supported languages, updated the documentation.
    Changed files: README, linkchecker, FAQ
  * Remove --robots-txt option from documentation, it is per default
    enabled and you cannot disable it from the command line.
    Changed files: linkchecker, po/*.po
  * fix --extern argument creation
    Changed files: linkchecker, linkcheck/UrlData.py
  * Print help if PyDNS module is not installed
    Changed files: linkcheck/UrlData.py
  * Print information if a proxy was used.
    Changed files: linkcheck/HttpUrlData.py
  * Updated german documentation
    Changed files: po/de.po
  * Oops, an FTP proxy is not used. Will make it in the next release.
    Changed files: linkcheck/FtpUrlData.py
  * Default socket timeout is now 30 seconds (10 was too short)

1.6.2:
  * Warn about unknown Content-Encodings. Dont parse HTML in this case.
  * Support deflate content encoding (snatched from Debians reportbug)
  * Add appropriate Accept-Encoding header to HTTP request.
  * Updated german translations

1.6.1:
  * FileUrlData.py: remove searching for links in text files, this is
    error prone. Just handle *.html and Opera Bookmarks.
  * Make separate ChangeLog from debian/changelog. For previous
    changes, see debian/changelog.
  * Default socket timeout is now 10 seconds
  * updated linkcheck/timeoutsocket.py to newest version
  * updated README and INSTALL
  * s/User-agent/User-Agent/, use same case as other browsers