bring the functionality from UD's HueFilter into FilterUtil.  I need to test this with UD to make  sure it works, and then these matrix functions should probably be put into a separate lib class  (perhaps a new narya com.threerings.util.Matrix?)
bring the functionality from UD's HueFilter into FilterUtil.  I need to test this with UD to make 
sure it works, and then these matrix functions should probably be put into a separate lib class 
(perhaps a new narya com.threerings.util.Matrix?)


git-svn-id: b675b909355d5cf946977f44a8ec5a6ceb3782e4@203 ed5b42cb-e716-0410-a449-f6a68f950b19

threerings/nenya,threerings/nenya