Local Discovery addendum update for mDNS

Hi all,

Claes and I updated the addendum to support mDNS. 

http://w3c-test.org/dap/wi-addendum-local-services/

The basic idea is same as that for UPnP. The discovery protocol is used
to obtain the location of the WebIntents page. 

Since I'm a newbee of ReSpec, I couldn't resolve bib-ref error in 
this version. It should be fixed when Claes comes back from Vacation :).

Regards,
Kikkawa

---------------------------------------------
 Norifumi Kikkawa <Norifumi.Kikkawa@jp.sony.com>
  Section 1
  Network Technology Dept.
  Information Technology Development Division
  System & Software Technology Platfotm 
  Sony Corporation
 (TEL) +81 50 3750 3953 
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