Log Message:
Update ruby-RMagick package 1.13.0:

RMagick 1.13.0
    o Added transform, transform!, transpose, transpose! methods to Image class
      (available with ImageMagick 6.2.8)
    o Feature #4844, add auto_orient, auto_orient! methods to Image class
      (suggestion from John Oordopjes, available with ImageMagick 6.2.8)
    o Added adaptive_sharpen, adaptive_sharpen_channel methods to Image class
      (available with ImageMagick 6.2.7)
    o Added composite_image_channel, composite_image_channel! methods to Image
      class (added in ImageMagick 6.2.6)
    o Added radial_blur_channel method to Image class (available in
      ImageMagick 6.2.4)
    o Fix bug #4806, add hash, eql? methods to Pixel class (bug report from
      Tim Pease)
    o Change extension filename to match RubyGems 0.9.0 expectations.
    o Fix bug #4821, correct doc for Image#rotate (bug report from Tim Pease)
    o Update the Draw#annotate documentation