Log Message:
Update RMagick to 2.0.0.

RMagick 2 is the future of RMagick. This is the version that will get new
methods and support new ImageMagick features.

RMagick 2 does not support GraphicsMagick.

Changes:
RMagick 2.0.0
    o Replaced configure/make/make install with standard Ruby setup.rb,
      extconf.rb
    o Removed support for Ruby earlier than 1.8.2
    o Removed support for GraphicsMagick. As a result these methods are no
      longer available: Image#grayscale_pseudo_class, Image#statistics.
    o Removed support for all releases of ImageMagick earlier than 6.3.0.
    o Removed deprecated Image#random_channel_threshold. Use
      Image#random_threshold_channel instead
    o Removed deprecated Image#channel_threshold. Use
      Image#random_threshold_channel instead
    o Removed unecessary Image#montage=
    o Removed unecessary and undocumented Image#image_type=
    o Removed deprecated Image::Info#tile_info, tile_info= attributes.
    o Removed deprecated Image::Info#tile, tile= attributes. Use #extract,
      #extract= instead
    o Removed deprecated Image::Info#subimage, subimage= attributes. Use
      scene, scene= instead
    o Removed deprecated Image::Info#subrange, subrange= attributes. Use
      number_scenes, number_scenes= instead
    o Removed deprecated Magick.set_monitor. Use Image#set_monitor,
      Image::Info#set_monitor instead
    o Removed deprecated RunlengthEncodedCompression CompressionType. Use
      RLECompression instead
    o Deprecated Image#matte, matte= with ImageMagick 6.3.5 and later
    o Added Image::Info#stroke=, stroke_width= and undercolor= attributes
    o Added Image::Info#tile_offset= attribute
    o Added Draw#fill_pattern= and #stroke_pattern= annotate attributes
    o Changed Image::Info[] and Image::Info[]= to allow an omitted \ 
\"format\"
      argument
    o Added Image#destroy!, destroyed?, check_destroyed methods
    o Support Image object creation/destruction tracing with the
      Magick.trace_proc attribute
    o Added Magick::QuantumRange. Magick::MaxRGB is deprecated.
    o Added OptimizeTransLayer, RemoveDupsLayer, RemoveZeroLayer,
      OptimizeImageLayer ImageLayerMethods enum values (available with
      ImageMagick 6.3.3),
      MosaicLayer, FlattenLayer (available with ImageMagick 6.3.6)
    o RMagick works with Q32 version of ImageMagick
    o Added ChangeMaskCompositeOp, DivideCompositeOp, LinearLightCompositeOp
      CompositeOperator enum values
    o Added SplineInterpolatePixel InterpolatePixelMethod enum value
    o Added DitherVirtualPixelMethod, RandomVirtualPixelMethod,
      BlackVirtualPixelMethod, GrayVirtualPixelMethod, WhiteVirtualPixelMethod
      (available with ImageMagick 6.3.5), and MaskVirtualPixelMethod (available
      with ImageMagick 6.3.3) VirtualPixelMethod enum values
    o Added GIFInterlace, JPEGInterlace, PNGInterlace Interlace type enum
      values (available with ImageMagick 6.3.4)
    o Added SentinelFilter FilterTypes enum value (available in ImageMagick
      6.3.6)
    o Added Image.combine
    o Added Image#separate (available with ImageMagick 6.3.2)
    o Added Image#distort (available with ImageMagick 6.3.5)
    o Added Image#each_pixel (thanks to Russell Norris for the suggestion and
      code)
    o Added Image#histogram? (available with ImageMagick 6.3.5)
    o Added Image#sync_profiles  (available with ImageMagick 6.3.2)
    o Added Image#extent (available with ImageMagick 6.3.1)
    o Added Image#excerpt, Image#excerpt! (available with ImageMagick 6.3.5)
    o Added Image::Info#attenuate
    o Added Image#clut_channel (available with ImageMagick 6.3.5)
    o Feature Request #16264, added ImageList#composite_layers (available with
      ImageMagick 6.3.3, request from Steve Martocci)
    o Added Image#alpha= (available with ImageMagick 6.3.5)
    o Added Image#gravity=
    o Added Image#equalize_channel (available with ImageMagick 6.3.6)
    o Added new FilterTypes values KaiserFilter, WelshFilter, ParzenFilter,
      LagrangeFilter, BohmanFilter, BartlettFilter (available with ImageMagick
      6.3.6)
    o Fix bug #10339, Image#trim does not support \"reset page information
      option\" (bug report from Nobody)
    o Renamed RMagick.so to RMagick2.so to prevent confusion between RMagick.rb
      and RMagick.so
    o Feature Request #16276, re-organize doc to not split Image method pages
      in the middle of an initial letter (request from Roy Leban)
    o Updated for ImageMagick 6.3.7-5
    o Made changes as necessary to work with current Ruby 1.9.0