Wikidata contains a host of file format information. Wikidata records
provide information about format names, identifiers (PUID, LoC FDD),
file-extensions, MIMEtypes, and format identification patterns. This
means it might be quite handy as an extension to Siegfried's
capabilties.

This is the first-cut of that work. We are able to harvest
information from the Wikidata Query Service. Create an identifier.
And consume the information in the identifier to match file-formats
using format-identification patterns taken directly from the
service.

We attempt to return new information not otherwise present in other
identifiers yet, for example, signature provenance. Provenance is
recorded in Wikidata as well as the date a format-identification
pattern was added. We try and replay this to the user to enrich
what is available to them.

This work is graciously supported by Yale University Library
(Euan Cochran, Kat Thornton) and Richard Lehane. It has been fun
trying to put this out there for folk.

Add archive formats to Wikidata configuration so that Siegfried can
attempt to decompress archive formats during processing.

Skeleton tests have been added to the Wikidata work.

IsArchive() handling has been updated to be a little more dynamic,
and theoretically easier to add to for other identifiers. Tests
have also been added for legacy compatiblity.

We provide some additional tests to make sure results come back
from the identifier as expected. With this addition we add checks
for extension mismatches and container pattern matching when the
Wikidata signature is combined with PRONOM.

The wikidata definitions file has been minimized in an attempt to
improve test execution time.