Log Message:
Update GraphicsMagick to 1.3.15.

1.3.15 (April 28, 2012)
==========================

Security Fixes:

  * Libpng in Windows build is updated to 1.5.10 release.  Provides a
    fix for CVE-2011-3048.

Bug fixes:

  * PNG - fixed problem with bit depth when the encoder decides to
    write RGBA instead of indexed PNG.

  * Fixed some temporary file leaks which were caused by the temporary
    file name being automatically extended to include a scene number,
    and therefore fail to be deleted.

New Features:

  * Added '+noise random' and '-operator noise-random' to 'convert'
    and 'mogrify'.  This modulates the existing image data with
    uniformely random noise.

  * Added -strip option in composite, convert, mogrify, and montage to
    remove all profiles and text attributes from the image.

  * Added -repage option to composite, convert, mogrify, and montage
    subcommands to reset or adjust the current image page offsets
    based on a provided geometry specification.

  * New C function StripImage() to remove all profiles and text
    attributes from the image.

  * New C function ResetImagePage() to adjust the current image page
    canvas and position based on a relative page specification.

  * C functions GenerateDifferentialNoise(), AddNoiseImageChannel(),
    QuantumOperatorRegionImage(), AddNoiseImage() updated to support
    RandomNoise enumeration.

  * New C++ Image method strip(), and unary function stripImage() to
    remove all profiles and text attributes from the image.

  * XCF format now respects image subimage and subrange members so
    that returned image layers may be selected.

  * The INFO coder (e.g. output file "info:-") now respects the
    -format option so that its output may be adjusted identically to
    how -format works for 'identify'.

  * TclMagick now supports Random noise.

Feature improvements:

  * C function ThumbnailImage() now allows the user to override the
    filter used, but still defaults to using the box filter.

Performance Improvements:

  * None

Behavior Changes:

  * No longer add a printf-style scene formatting specification to
    filenames which do not have one and no longer automatically
    operate in 'adjoin' mode in such cases.  If multiple numbered
    files are intended to be output, then add +adjoin to the command
    line and use an output filename specification similar to
    "image-%d.jpg".  Output files are now completely specified and
    predictable but this may break some existing usages which
    anticipate the automatic file numbering.