Added *.dv to MT_FILTER_MOVIE_FILES.  Loading .dv movies appears to work OK on OS X 10.5 with quicktime.
Added *.dv to MT_FILTER_MOVIE_FILES.  Loading .dv movies appears to work OK on OS X 10.5 with quicktime.

git-svn-id: efee09ee66643ea208db8880d8809c0954bd33d6@43 a658d305-d20c-4271-b950-7aa421b211f3

leonard-lab/MADTraC,leonard-lab/MADTraC,leonard-lab/MADTraC,leonard-lab/MADTraC,leonard-lab/MADTraC,leonard-lab/MADTraC,leonard-lab/MADTraC