ImageMagick 5.5.3 released

ImageMagick 5.5.3 is primarily a bug fix release as detailed below. The
release is currently mirroring and should be available at all the standard
archive sites by tommorrow.

Bug fixes and enhancements include:

* End-of-file is now an informational error. Previously no image was
  returned on an EOF.
* PingImage() stopped working properly with blobs.
* 16-bit TIFF occasionally was written in the wrong LSB/MSB order.
* IMDisplay now displays CMYK images correctly.
* Eliminated unnecessary quantization of grayscale images in MogrifyImage().
* CoaleseceImage() properly handles a dispose method of BackgroundDispose.
* CMYK JPEG images produced 'Bogus input colorspace' on output.
* The AdaptiveThresholdImage() offset parameter is now of type
  long. Previously it was of type unsigned long.
* Added GetRandomValue() to magick/random.c.
* SVG element 'stroke-dasharray: 0' no longer causes a seg fault.
* Small memory leak fix in the utilities (bug report by Glenn
  Randers-Pehrson).
* Added a new resource-- the maximum number of files the pixel cache can open.