Change subClassOf Quality

More than just Space Group can have a Symbol.  For example, an atom.
Add hasSymbol and hasMass
Change URI of :symbol
Add :hasName

I need a Datatype property that points to a label.  Anzo does not
recognize rdfs:label
Merge branch 'master' into ax
Remove Symbol Classes
Add label and comment to hasSymbol Datatype property
Add chemical symbol
Update matonto.ttl
Update matonto.ttl
Merge pull request #7 from iNovexIrad/ax

Ax