Include resources pointing to a valid ones in the output

#10

Assure subject to id promotion

0.11.13

MetadataCrawler::crawl(): make sure resources included because of bei…

MetadataHorizontal increase maximum number of parsed values to around 100

0.11.12

MetadataHorizontal::MAP_COL_TO: increase to 100

Harden against corner cases

0.11.11

MetadataSpreadsheetTrait::getValue(): harden against unicode-blank-ch…

MetadataChecker tuning

Relax a check of unresolvable object URIs existing as a subject in the dataset

EntitiesDatabase tuning

EntitiesDatabase does not report overwriting if exactly same DatasetNode
is assigned at the same key.

Disable doorkeeper-based tests

0.11.8

MetadataChecker::check(): disable doorkeeper tests as they may requir…

named entities reading tuning

0.11.7

README.md: badge fix

Harden against corner cases

0.11.6

MetadataSpreadsheetTrait: catch and report as warnings issues with Vo…

Bugfixes

Harden for dates-in-spreadsheet corner cases