Ethernet W5100/ENC gateway compile (not verified).

Remove SPI/ENC/W5100 from embedded libraies.

libraries/UIPEthernet/tests/perl/udpclient.pl

@@ -1,26 +0,0 @@
-#!/usr/bin/perl
-#udpclient.pl
-
-use IO::Socket::INET;
-
-# flush after every write
-$| = 1;
-
-my ($socket,$data);
-
-#  We call IO::Socket::INET->new() to create the UDP Socket
-# and bind with the PeerAddr.
-$socket = new IO::Socket::INET (
-PeerAddr   => '192.168.0.6:5000',
-Proto        => 'udp'
-) or die "ERROR in Socket Creation : $!\n";
-#send operation
-$data = "data from client";
-$socket->send($data);
-
-#read operation
-$data = <$socket>;
-print "Data received from socket : $data\n ";
-
-sleep(10);
-$socket->close();