agent.
* The code is based on that from AgentClient.cc, but without the Qt
dependency.
* The API currently uses blocking I/O. The intent is for users to use
a separate read thread and write thread.
* Add a note on how to use instsrv and srvany.
* First look for Agent.exe in the same directory as TestNetServer.exe
before looking for the executable in the build directory that Qt
Creator uses.
* Write a script that copies MinGW/Qt DLLs to a single directory.