Log Message:
Update atk to 2.8.0

Changes in version 2.8.0:
==========================
*
* Updated Visual C++ configuration files
  * Make entries more consistent with the other GNOME Visual Studio
    projects.
  * Enable the building of introspection files for Visual C++ builds
  * bgo694255: Visual C++ builds: Integrate building of introspection files
* Updated Slovak, Portuguese and Tadjik translation.

Changes in version 2.7.91:
==========================
*
* atkobject: added a explicit include to locale.h

Changes in version 2.7.90:
==========================
*
* Bug 694117
*  * atkobject: add atk_object_get_object_locale
*  * atkdocument: deprecate atk_document_get_locale

Changes in version 2.7.5:
==========================
*
* build: Use GNOME_COMPILE_WARNINGS
* atkhyperlink: Ensure we get even deprecated prototypes
* Bug 651343: add ATK_ROLE_LEVEL_BAR
* Prepare Visual Studio 2010 projects for Visual Studio 2012
* Updated Uyghur translations

Changes in version 2.7.4:
==========================
*
* Bug 690379: Atk lacks any kind of version utilities
* Fixed out of tree builds caused by fix of bug 690379
* Bug 656750: AtkWindow requires documentation

Changes in version 2.7.3:
==========================
*
* Bug 689907: Problems with the management of
*  ATK_STATE_SELECTABLE/ATK_STATE_SELECTED states at AtkObject
* Bug 686746: Port introspection fixes from Vala
* Bug 689952: Add introspection support for Windows MSVC builds
* Other Visual C++ configuration files:
*  * Use MultiByte character set

Changes in version 2.7.2:
==========================
*
* Bug 686801: Extend atk_add_global_event_listener in order to support
*   signal details
* Updated Thai translation.