Use htsworkflow ontology to validate various RDF using components.

Use htsworkflow ontology to validate various RDF using components.
Of course to use the ontology I had to make one first.
Unsurprisingly implementing it touched a bunch of code & templates.

I tried to be more consisten with using mixed-case names for
classes and lower_case names for properties.

There's some inconsistencies. like i use the term notes & comments
in different areas. Also, should I be using my own terms or
do better at reusing more standard ontologies?