ENH: Add a method to parse a VOI LUT from DICOM data.
ENH: Add support for VOI LUTs to ImageFillerStep.
ENH: Add stream operators to transfer function classes to write them to and read them from QDataStreams.
ENH: Save and read VOI LUTs from the database.
ENH: Add a method to get the inverse of a VOI LUT.
ENH: The VOI LUT is finally applied in Q2DViewer.
DOC: Remove old comment from qviewer.h.
COMP: Change variable type to remove signed/unsigned warnings.
ENH: Remove unused class.
COMP: Remove unneeded forward declarations and includes.
ENH: Remove unnecessary code.