add operator==, localPort, remotePort and remoteIP to UIPClient, new example AdvancedChatServer.ino
small changes to AdvancedChatserver.ino plus add operator!=
add uip_debug to allow debugging changes in uip_conn
move Dhcp.* and Dns.* to library root
Merge pull request #22 from ntruchsess/publish_dns_dhcp

move Dns and Dhcp to library root (as in stock Ethernet lib)
Merge branch 'experimental'
add operator== and != as in https://github.com/arduino/Arduino/pull/1700
Merge remote-tracking branch 'upstream/master'