MAJOR CHANGES:

MAJOR CHANGES:
- doesn't use thread anymore, use process with a master process which
  uses two pipes to chat about stylesheets related changes, if the
  stylesheet list needs a change master process kills the child process
  holding the Http daemon, performs the needed changes to the stylesheet
  list and runs a new Http daemon child process
MINOR CHANGES:
- disabled debugging by default
- use logfile support and log to "uwobo.log" by default
- changed default port to 58080
- moved http response facilities to Uwobo_common
- moved usage string to Uwobo_common
- fixed copyright notice