Document parsed values stored as attributes

[dhalbert]

.latitude, .latitude_minutes, .timestamp_utc, and all the other attributes set when parsing the sentence are not documented in the API doc. This should be fixed.

[awordforthat]

Picking this up at PyCon2023

[jerr0328]

This was fixed in #96? Is there something else to be done for this?

[awordforthat]

Yes, this can be closed.

[tannewt]

Thanks!