add functionality: get ethernet header, ipv4 header and tcp header.
add project to test tcp ip connections & send operation. it still does not retrieve the info correctly.
rename TestTcpIp -> TcpClient. Also modify tcpclient: it sends and receives from server.
server - for the client to do both send and receive.
add TcpServer, renamed TestTcpIp, made the retrieval of the data work: we get a pointer to the content of the packet (in the example here the ascii "whatever").