Follow redirects when querying sparql

Some SPARQL servers redirect requests. This allows the library to follow
redirects, and raise an error in case of a large number of redirects.
Merge pull request #52 from no-reply/feature/follow-redirects

Follow redirects when querying sparql.

Thanks!
Update dependency on net-http-persistent to ~> 2.9.
Disable Repository tests, as Dydra is really just too slow for remote testing, and WebMock continues to be enabled, causing errors.
This relates to issue #18.
disable webmock for rdf-spec repo tests and reenable repo tests
Merge pull request #53 from ngottlieb/fix-tests

disable webmock for rdf-spec repo tests and reenable repo tests
Version 1.1.3.1.
Release 1.1.3.1.

* Some SPARQL servers redirect requests. This allows the library to follow
redirects, and raise an error in case of a large number of redirects. (Tom Johnson)
* Update dependency on net-http-persistent to ~> 2.9. (Nick Gottlieb)
* This relates to issue #18.