Log Message:
Update GraphicsMagick to 1.3.1.

1.3.1 (November 17, 2008)
=========================

Security Fixes:

  * None.

Bug fixes:

  * RPM build, Fixes to successfully build binary RPMs for Red Hat
    Linux 4.

  * MSL/conjure, Fix bug with attributes becoming appended to
    themselves.  Fix memory leaks.

Feature improvements:

  * New --disable-openmp-slow configure option for disabling use of
    OpenMP for algorithms which may run slower on operating systems
    with crummy thread libraries.

  * JPEG, Allow user to specify DCT encoding method via
    jpeg:dct-method define.  Also allow control over whether huffman
    encoding is used via jpeg:optimize-coding define.

Performance Improvements:

  * OpenMP (parallel processing) improvements for these functions:

    - Rotate by 90 and 270 degrees (-rotate)