Changed NeXML translation to use quality-focused model.
Updated MGI and HP converters to quality-focused model.
Updated ZFIN converter to quality-focused model.
Updated generated restriction classes.
Revising absence reasoning for lacks_all_parts_of_type.
Added named classes for ZFIN compositions.
Filtered out owl:Nothing from generated axioms.
Merge pull request #2 from phenoscape/quality-focus

Updated all phenotype creation to use quality-focused model.