Wrap everything in namespace

example/example.cpp

inc/ipaddr.hpp

inc/resolver.hpp

inc/sockaddr.hpp

inc/tcplistener.hpp

inc/tcpstream.hpp

inc/udpsocket.hpp

src/ipaddr.cpp

src/resolver.cpp

src/sockaddr.cpp

src/tcplistener.cpp

src/tcpstream.cpp

src/udpsocket.cpp

test/test.cpp