Merge pull request #206 from jctoledo/master

updated endpoint summary page
Modified script so that summary table is sortable
Merge pull request #207 from alisoncallahan/master

Adding sorting to HTML summary table
Merge pull request #208 from jctoledo/master

minor edit to table heading
Merge pull request #209 from jctoledo/master

added two additional tables to dataset descriptions
added rdfs:subClassOf property