Bugfix in subTypeOf: due to definitions of AbstractDataTypes acting as strict sub-types we can not simply let aliases invert the sub-type relation anymore. 
Bugfix in subTypeOf: due to definitions of AbstractDataTypes acting as strict sub-types we can not simply let aliases invert the sub-type relation anymore. 

cwi-swat/pdb.values,cwi-swat/pdb.values,usethesource/rascal-value