- merge FibreCluster and PollerCluster

src/libfibre/EventEngine.h

src/libfibre/Fibre.h

src/libfibre/FibreCluster.h

src/libfibre/Poller.cc

src/libfibre/Poller.h

src/libfibre/SystemProcessor.cc

src/libfibre/SystemProcessor.h

src/libfibre/cfibre.cc

src/libfibre/echotest.cpp

src/libfibre/fibre.h

src/libfibre/include/u++.h

src/libfibre/lfcore.cc

src/libfibre/webserver.cpp