Change namespace from daq to felix

asyncmsg/Error.h

asyncmsg/Message.h

asyncmsg/NameService.h

asyncmsg/Server.h

asyncmsg/Session.h

asyncmsg/UDPSession.h

asyncmsg/asyncmsg.h

asyncmsg/detail/Header.h

src/Error.cxx

src/Interface.cxx

src/Interface.h

src/NameService.cxx

src/Server.cxx

src/Session.cxx

src/UDPSession.cxx

test/test_lookup.cxx

test/test_namesvc.cxx

test/test_udpsession.cxx