ACTION 528: per-spec manifests

As part of the test suite coverage report I've been doing, I added some more detail in manifest-all.ttl to describe relevant manifests on a per-spec basis. The new data looks like this:

<http://www.w3.org/TR/sparql11-federated-query/> rdfs:label "SPARQL 1.1 Federation Extensions" ;
	mf:conformanceRequirement (
		<syntax-fed/manifest.ttl>
		<service/manifest.ttl>
	).

… describing that the conformance criteria for the federated query document are tested by the tests contained in the two listed manifests.

Based on the tests currently in CVS, I've done this for these spec documents:

- Query
- Update
- CSV/TSV
- Federation
- Entailment

thanks,
.greg