Changes in version 1.12.3: 
=========================
*
* Add missing signals to fix win32 build (Cedric Gustin, bug #355912).
* New linguas: 'te' (Sunil Mohan Adapa), 'dz', 'ku' (Abel Cheung).
* Implement AtkDocument signals (Neo Liu)
* Update docs to include info on AtkDocument signals.
* Bugfixes: #357847, #340553, #346464, #352227,