Do not create a new subject on multiple mappings when a subclass or superclass

When we have multiple mappings for a page every mapping is assigned a new subject. With this commit we do not create a new subject if the current mapped class is a subclass or superclass of all previous mappings for this page
Remove duplicate rdf:type quads
Remove duplicate rdf:type quads
Merge pull request #4 from ninniuz/multipleTemplates

Multiple templates