Change VirtuosoRDFRepo to interface RDDataRepository in method create in DataUnitFactory class.
Add RDFDataUnitException class.
Update RDFException - extends for RDFDataUnitException.
Remove warnings from commons-module (ConfigWrap,BaseConfigDialog).
rename method extractfromFile/SPARQLEndpoint to extractFromFile/SPARQLEndpoint.
Add new different extractFromFile, loadToFile, loadtoSPARQLEndpoint methods to RDFDataRepository interface.
Add implementation of new added method in LocalRDFRepo class.
Add implementation to RDFDataUnit - solved issue #208