* Use "itimer" instead of alarm when available for higher resolution
  timing in setTimer/getTimer.

* Determine more pthread targets which may allow SIGALRM to be used
  beyond Linux for multiple timer instances.

* Optional support for Posix timers rather than alarm or setitimer
  for getTimer/setTimer when available on target platform.

* Introduce "stream" support for Pipe.

* Manual and overview documentation.

* GNU PTH specific source tree.

* redo exception handling

* why Solaris use select instead of poll for TCPService ???

WIN32

* merge Thread implementation (main cancellation)

* serial support (Serial, TTYStream, ttystream, TTYSession, SerialPort,
  SerialService)

* SocketPort class

* CommandOption and related class

* fifostream, FIFOSession classes (use NamedPipe ??) or document 
  not win32 support

* completion mode in RandomFile

* MappedFile class

* SocketPort and SocketService classes

* Conditional class


