Julio Caguano

@lewismc just as a remainder, this will be the PR that I will be using in the last stage of GSoC.

Thanks @lewismc for the feedback. I will work on all your suggestions.

Thanks for your comments @lewismc. Will do it! :smile: @HansBrende librdfa supports RDFa 1.0 and 1.1, so I made sure that librdfa extractor works on all tests that Semargl extractor...

> You should also test against the RDFaExtractorTest and RDFa11ExtractorTest classes. @HansBrende it is testing those main tests as well. It is testing the tests of Semargl RDFa 1.0 (`RDFaExtractorTest`),...

I changed the base branch. Thanks so much @HansBrende