Added sample/test file for the new feature.
Added basic documentation about GBIF's search result format.
Intermediate commit.
Merge UTF8 fix, manually fixed conflict.
Basic non-regression tests for GBIFResultsReader.
GBIFResultsReader has gained 'citations' and 'rights' properties.
GBIFResultsReader now exposes a source_metadata property.
DwCALine instances now have a source_metadata property (if applicable, currently only for GBIF search results).
Forgotten sample test file.
Updated doc. to include GBIFResultsReader.