improved README summaries

examples/src/README.md

+## MV3500 Examples Source Archive
+
+### View this page at https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/blob/master/examples/src/README.md
+
+1. [TcpExamples](TcpExamples) show how to create connection-oriented Transmission Control Protocol (TCP) sockets
+
+2. [UdpExamples](UdpExamples) show how to create User Datagram Protocol (UDP) sockets
+
+3. [OpenDis4Examples](OpenDis4Examples) illustrate use of (legacy) OpenDis4 library for IEEE Distributed Interactive Simulation (DIS) Protocol
+
+4. [OpenDis7Examples](OpenDis7Examples) illustrate use of latest OpenDis7 library for IEEE Distributed Interactive Simulation (DIS) Protocol
+
+5. [SimkitOpenDis7Examples](SimkitOpenDis7Examples) provides simple examples combining Simkit Discrete Event Simulation (DES) and IEEE DIS
+
+6. [HttpServletExamples](HttpServletExamples) shows how to use Java Servlets as server-side code running on an http server

examples/src/TcpExamples/README.md

 ## TCP Examples Source Code
 
+Programs in this directory show how to create connection-oriented Transmission Control Protocol (TCP) sockets
+
 ### View this page at https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/blob/master/examples/src/TcpExamples/README.md
 
 | Telnet example       |  Telnet connection counting   | 

examples/src/UdpExamples/README.md

 ## UDP Examples Source Code
 
+Programs in this directory show how to create User Datagram Protocol (UDP) sockets
+
 ### View this page at https://gitlab.nps.edu/Savage/NetworkedGraphicsMV3500/-/blob/master/examples/src/UdpExamples/README.md
 
 |  Unicast UDP Sender packets in Wireshark     | Multicast UDP Sender packets inWireshark  |