Create anchor with last part of the URI

[dayures]

Originally reported by: Carlos Tejo (Bitbucket: carlos_tejo, GitHub: Unknown)

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Nowadays, the creation of a human readable anchor is only consider when the resource has a fragment part (http://example.org/foo#fragment).

It could be improved for resources without fragment part (http://purl.org/biolang/vocabulario/Gen)

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• Bitbucket: https://bitbucket.org/fundacionctic/parrot/issue/19