GraphicsMagick 1.3.16 released

GraphicsMagick 1.3.16 is now released, and is the version recommended 
to use.

Please visit the GraphicsMagick web site at 
http://www.graphicsmagick.org/ to learn more about GraphicsMagick, or 
to download files.

The following are the updates since the prior release:

Security Fixes:

   * Don't translate 'comment' and 'label' attributes if the request is
     made while a file is being read.  Only translate such attributes
     if they come from the command line or API user.

Bug fixes:

   * SWT: SWT reader suffered from a number of implementation errors
          which caused it not to work any more.  Works again.

   * XBM: Fix memory leak observed when reading file in 'ping' mode.

   * Support -trim on images which use a consistent (single color)
     transparent background.  In this case, trim is done based on
     opacity rather than foreground color.

   * Include <sys/types.h> in order to assure that 'size_t' and
     'ssize_t' are declared.  This is necessary since
     MagickExtentImage() uses these types as part of its definition.