new function NodeOntology::returnOnlogies() will return a hash of the ontologies above this one;
fixed function NodeOntology::isSon(string & identifier)
added function Ontology::checkAncestorOneAnother(string ontologyA, string ontologyB);
added function Ontology::getNewOntologies(vector <pair <string, string>> & transaction);
added note for bug
modified comment
added test code for ontologies
removed files from the last meeting