0.7.13

Bugfix release:
[ Matteo Cypriani ]

• Fix for issue #79
  Add support for xz compression
• Fix for issue #84
  Use .lzma extension for lzma-compressed files

[ Maximiliano Curia ]

• Fix for debian bts #831759
  Fix pattern generation
• Migrate from Net::Lite::FTP back to Net::FTP
• Force gzip to ignore the filename and timestamp

[ mr-GreyWolf ]

• Add Russian language file