start DGRM plugin with cooja_default.config
start the DGRMconfigurator within the cooja_default.config instead of starting in DirectedGraphMedium.java
BaseRSSI plugin added
plugin to view and change the base rssi.
for further implementation of random base rssi generation
start DGRMVisualizerSkin in cooja_default.config now
instead of starting in DirectedGraphMedium
deleted unneeded if
getStringArrayValue never returns null