Knowledgecore

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* bump version
* Contributors: Séverin Lemaignan

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* fixed representation of string + fix logic of lookup() for RDFS.label
* fix exception when using wildcard statement retractation
While here, removed from the unittest the unsupported case of multiple statements with wildcards
* Contributors: Séverin Lemaignan

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* more robustely parse RDF terms
* Contributors: Séverin Lemaignan

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* bump version
* Contributors: Séverin Lemaignan

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* fix bug in wildcard retract when objects are literals
* Contributors: Séverin Lemaignan

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* add diagnostics publishing
* Contributors: Séverin Lemaignan