[Contacts] Split of read and write specifications

I've split the work of the Contacts API to two specifications as agreed at
the recent London F2F [1].

The latest editor's draft of the specifications can be found here:

http://dev.w3.org/2009/dap/contacts/Overview.html

http://dev.w3.org/2009/dap/contacts/Writer.html

Other updates are still required for these specifications. Changes will be
added early and often in the coming days.

Kind regards,

Richard

[1] http://lists.w3.org/Archives/Public/public-device-apis/2010Jul/0112.html