align PHP Shindig with Portable Contact spec

[Ja...@gmail.com]

Reviewers: chabotc, panjie.pan, Jinhui Du,

Description:
This patch includes all needed changes in PHP Shindig code.

And the modifications in Partuza (especially the changes on DB table
schema and fetcher) will be submitted in another patch.

A comparison of poco / OpenSocial0.9 / PHP Shindig could be found on
http://docs.google.com/Doc?id=dg3s72kb_467rv5wc8ch

Please review this at http://codereview.appspot.com/63072

Affected files:
   php/src/common/sample/BasicOAuthDataStore.php
   php/src/gadgets/ContainerConfig.php
   php/src/gadgets/oauth/BasicGadgetOAuthTokenStore.php
   php/src/social/converters/OutputAtomConverter.php
   php/src/social/converters/OutputXmlConverter.php
   php/src/social/model/Address.php
   php/src/social/model/Name.php
   php/src/social/model/Organization.php
   php/src/social/model/Person.php
   php/src/social/oauth/OAuth.php
   php/src/social/sample/JsonDbOpensocialService.php
   php/src/social/servlet/DataServiceServlet.php
   php/test/social/AddressTest.php
   php/test/social/NameTest.php
   php/test/social/OrganizationTest.php
   php/test/social/OutputAtomConverterTest.php
   php/test/social/OutputJsonConverterTest.php
   php/test/social/OutputXmlConverterTest.php
   php/test/social/PersonTest.php