RasterYuv422 builds.
Added an extra minus for visibility in ReferenceCounter printout.
Added RasterYuv422Semipacked and fixed related things in GPU classes.
Fixed use file.
Renamed asType to toType in Color.ooc.
Removed DictionaryTest, because the Dictionary class no longer exists.
Removed HeapVectorFreeTest, because it uses the Dictionary class, which no longer exists.
Merge pull request #91 from davidhesselbom/master

Added RasterYuv422 class and cleaned up a few things.