dclib x.fetch() seem to only ask for .ttl

[skwlilac]

DCLIB's x.fetch function only seems to ask for.ttl responses. Some RDF sites are capable of supplying RDF/XML but don't offer turtle, eg. companies house linked-data:

`http://business.data.gov.uk/id/company/01649776`

The following DCLIB warning arises when a .fetch() operation is performed on that URI

12:40:39.253 Warning: exception fetching http://business.data.gov.uk/id/company/01649776, org.apache.jena.atlas.web.HttpException: 406 - Unsupported content type: ttl

It would be useful if DCLIB made requests that also accept RDF/XML responses (may be it does already, in which case it may be an issue with the way this particular site responds).

[kal]

Worth investigating if this is the case. If it was a case of the dclib fetch implementation only requesting/handling TTL, then an enhancement should be deverloped. If it was to do with handling a bad response from the server, then close as wontfix.