Log Message:
Update to 2.6.0

* Fix some crashes in atk_bridge_adaptor_cleanup (BGO#684434).
* When the cache is activated, register it on the main D-Bus connection.
* Fix atspi_hyperlink_get_uri (BGO#683182).
* Only initialize the cache when an AT is running.
* Fix various memory leaks (BGO#683979, BGO#684077)
* Removed the gtk 3.0 module (BGO#678315).
* Don't leak a GError when option parsing fails (BGO#679296)
* Rework some inefficient code when removing clients and events (BGO#679295,
  BGO#679297).
* Implement GetLocalizedName for actions (BGO#680598)
* Allow to build out of source directory (BGO#680280).
* No need to include i18n support: There's nothing to translate here.