added new pellet version
added some convenience methods for getting grounding parameters added interfaces, classes and converters for JavaVariable and JavaParameter for JavaGrounding added remove and delte functionality for groundings (NOT yet for upnp)
upped Pellet to 2.4 RC1 cause of a bug in Pellet occurring while deleting OWLIndividuals attention: Jena was left in old version. eventually some incompatabilities do exist!!!
Import of owl-s rev 6849 from https://svn.mindswap.org/owls/trunk/