TMI-73: Now handles TIFF files using only the lower 8 bits of each 16 bit entry in the ColorMap.
TMI-74: Make JPEG segment parsing more lenient
TMI-77: Fixed bug in predictor for tiled TIFFs.
TMI-74: Make JPEG segment parsing more lenient (missing file).
TM-80: DecoderStream.skip now correctly skips the bytes it reports as skipped.