Log Message:
Update atk to 2.24.0

Changes in version 2.24.0
==========================
*
* Build, MSVC
   * Support Visual Studio 2017

Contributors:
Chun-wei Fan

Translations:
Ask Hjorth Larsen (da), Jordi Mas (ca)

Changes in version 2.23.4
==========================
*
* Build, MSVC:
   * Remove atk-install.props's on re-generation
   * Makefile.msvcproj, Makefile-newvs.am: Update from GLib
   * Move files to win32
* Docs:
   * Fix typo
   * Bug 772236: change id of the atkobject chapter needed case-insensitive \ 
filesystems
* Misc:
   * Use Unicode apostrophe in a translatable string

Contributors:
Murray Cumming, Piotr Drąg,  Chun-wei Fan, Alejandro Piñeiro Iglesias

Translations:
gogo (hr), Jordi Mas (ca), Fabio Tomat (fur)