shortcuts for DISv4 and OpenDISv7 examples

examples/nbproject/configs/4a.PduReceiver.properties

+main.class=DisExamples.PduReceiver

examples/nbproject/configs/4b.PduSender.properties

+main.class=DisExamples.PduSender

examples/nbproject/configs/4c.EspduReceiver.properties

+main.class=DisExamples.EspduReceiver

examples/nbproject/configs/4d.EspduSender.properties

+main.class=DisExamples.EspduSender

examples/nbproject/configs/7a.PduReceiver.properties

+main.class=OpenDis7Examples.PduReceiver

examples/nbproject/configs/7b.PduSender.properties

+main.class=OpenDis7Examples.PduSender

examples/nbproject/configs/7c.EspduReceiver.properties

+main.class=OpenDis7Examples.EspduReceiver

examples/nbproject/configs/7d.EspduSender.properties

+main.class=OpenDis7Examples.EspduSender