Determine if there is a problem with disjointness axioms in gist 9.1.0

[rjyounes]

See discussion in PR #192.

@uscholdm Creating issue in response to your concerns.

[sa-bpelakh]

Compared (via Protege) a merged 9.0.0 gist to a merged 9.1.0 gist, found that only differences were spelling corrections in annotations and definitions, plus some removed invalid properties. All class definitions, including disjointness, were identical.