added method stub and basic test (#42)
implemented first version of a method that deletes triples (#42)
changed DELETE strategy: relationship does not seem to be found when "cp" property is used (#42)
added dot (#42)
fixed property name (according to https://github.com/tinkerpop/blueprints/blob/master/blueprints-graph-sail/src/main/java/com/tinkerpop/blueprints/oupls/sail/GraphSail.java) (#42)
added method to add triple nodes (#42)
added test (#42)
improved object property assignment (#42)
fixed URIs (#42)
implemented triple creation (#42)
fixed property assignments (#42)
fixed value assignment: raw literal value must be assigned to object node (#42)
literal value must be stored as string, otherwise it is not recognized by the SPARQL plugin (via SPARQL query) (#42)
delete operation must also cast object values to string, otherwise the query conditions do not match (#42)
connector uses new addTriple() method now, which stores typed literals correctly (#42)
added test (#42)