tidy inventory
add schema:endDate to voteevent terms
update vote event terms inventory
split organizational hierarchy terms in inventory
reorder some vote-event properties
change some RDF terms for area
change an RDF term for motion
tweak documentation
remove the restriction that group results should not be reported if the group results have no impact on the overall result of the vote event: for example, results by party
update speech terms, fix area term
add empty code list to area
clarify a range restriction on Motion#creator
fix RDF terms in area, motion, voteevent jsonld contexts
normalize description of sources in json schema
fix some examples
ttl: add missing prefixes, remove extra prefixes, update to match new RDF terms
fill in speech class