Support for JBig2 encoding

In 1.7.0 trying to build an image (jpg) from a PDF that is a JBIG2 encoded image results in a blank image being created.
In 1.6.0 an image with a skewed black box is created.

In my logs I see:
2012-03-06 14:54:20,333 [http-bio-8080-exec-10] [INFO] unsupported/disabled operation: BDC
2012-03-06 14:54:20,348 [http-bio-8080-exec-3] [ERROR] Can't find an ImageIO plugin to decode the JBIG2 encoded datastream.
2012-03-06 14:54:20,348 [http-bio-8080-exec-3] [ERROR] Something went wrong ... the pixelmap doesn't contain any data.
2012-03-06 14:54:20,348 [http-bio-8080-exec-3] [WARN] getRGBImage returned NULL