Updates to metamodel output

There is an issue in the latest ShEx generator -- still needs fixing

Add functions to generator to support biolink-model-toolkit, issue #10

Also fixed issue #9 - don't issue warning message on bad prefixes

Checkpoint -- most things working

Still have a lot of work to do in the OWL space
Still have to address directed slots/domains

Checkpoint -- most things working

Still have a lot of work to do in the OWL space
Still have to address directed slots/domains

Checkpoint -- most things working

Still have a lot of work to do in the OWL space
Still have to address directed slots/domains

Slot and class uri's not inherited

Significant improvements

Checkpoint

Checkpoint

Complete includes model