UIPClient: save 40 bytes flash by reordering incoming packet processing
UIClient remove unnessesary cleanup of uip_packet
UIPEthernet.networkSend: fix cleanup of UIPETHERNET_SENDPACKET flag to avoid call of Enc28J60Network.sendPacket wich NOBLOCK argument
UIPEthernet: cosmetics
UIPClient: cleanup uip_len if uip_poll/uip_rexmit is unable to allocate outgoing block
UIPClient: ensure uip_slen (uip.c internal) is set allways set (as it's not cleared bevore poll-requests) (saves 14 bytes of flash)
update README
README: set version to 1.09