fix geo route and remove geo segment

[philblackwood]

Remove GeoSegment, change GeoRoute class equivalence to say it is an ordered collection whose members are GeoPoints (old class equivalence incorrectly said it was an ordered collection with GeoSegments as parts).
Closes #1165

[uscholdm]

MIssing release notes. We also talked about having a note that one could define a segment as a route with two points, but I think its too obvoius to say it. Though you might point it out in the release notes.

[dylan-sa]

Are we planning this one for 13.1 or 14.0? If the former, we should deprecate GeoSegment rather than delete.

[rjyounes]

We also can't normally rewrite the restrictions in a minor release; however, I think we can plausibly argue that both changes correct errors and are therefore patch updates.

@philblackwood GeoSegment should be deprecated rather than deleted. See section "How to Deprecate" in the deprecation instructions.
I would provide two bullet points in the release note, indicating (1) deprecation of GeoSegment and (2) correction of errors in the restriction on GeoRoute.

[rjyounes]

Though you might point it out in the release notes.

@uscholdm Our release notes are pretty bare bones, without justification or explanation. We link to the issue for that.

[rjyounes]

See Guidance on release notes in Contributing.md. Here's what I propose for this one:

### Minor Updates

- Deprecate `gist:GeoSegment`. Issue [#1165](https://github.com/semanticarts/gist/issues/1165).

### Patch Updates

- Correct errors in property restriction on `gist:GeoRoute`. Issue [#1165](https://github.com/semanticarts/gist/issues/1165).

[rjyounes]

This should be deprecated, with an editorial note and addition of a new issue for 14.0.0. See section "How to Deprecate" in Deprecation and Deletion Policy.

[philblackwood]

OK. Issue #1181 for gist 14 will remove GeoSegment. I deprecated GeoSegment and added a note referring to issue #1181 to remove GeoSegment in gist 14. Also corrected the class equivalence statement for GeoRoute so it uses isMemberOf and GeoPoint.

I think this is ready now. Thanks for the help.

[rjyounes]

Made one small change to editorial note: I made #1181 an umbrella issue for deprecated concepts and added a new issue #1182 for GeoSegment. (Should have done the other way around.)