Slackpkg 0.9.7.4 released

Version 0.9.7.4 - 24/Sep/2013
  - Try a better way to detect the newest version of the same package in local
    or remote directory (does not guarantees 100% success)
  - Try to download CHECKSUMS.md5.gz.asc if CHECKSUMS.md5.asc does not exists
    (as salixos repository)