Integrating support for addressbook 4.0

* configure.ac:
  Replace MODEST_ABOOK_OLD with MODEST_ABOOK_API, which contains the
  major version number of libosso-abook. Define
  OSSO_ABOOK_ENABLE_DEPRECATED.
* src/maemo/modest-address-book.c:
  Use OssoABookListStore instead of OssoABookTreeModel when needed.
* src/maemo/modest-address-book.c:
  Use OssoABookContactChooser when MODEST_ABOOK_API suggests it.

pmo-trunk-r4624