new class names and defines in examples

examples/Advanced/sPSN_Chat/sPSN_Chat.ino

examples/Advanced/sPSN_Client1/sPSN_Client1.ino

examples/Advanced/sPSN_Client2/sPSN_Client2.ino

examples/Advanced/sPSN_ClientMinimal/sPSN_ClientMinimal.ino

examples/Advanced/sPSN_PingTest/sPSN_PingTest.ino

examples/Advanced/sPSN_PlotTopics/sPSN_PlotTopics.ino

examples/Advanced/sPSN_PongTester/sPSN_PongTester.ino

examples/Basic/sPSN_Chat/sPSN_Chat.ino

examples/Basic/sPSN_Client1/sPSN_Client1.ino

examples/Basic/sPSN_Client2/sPSN_Client2.ino

examples/Basic/sPSN_ClientMinimal/sPSN_ClientMinimal.ino

examples/Broker/sPSN_Broker/sPSN_Broker.ino

examples/Broker/sPSN_BrokerVerbose/sPSN_BrokerVerbose.ino