Log Message:
Update to 2.12.1:
2.12.1
======

 Fixes
  - Code cleanups (Kjartan Maraas)
  - Open GModules with G_MODULE_BIND_LAZY (Kjartan Maraas)
  - Fix change notification with multiple sources (Alexander Larsson)
  - Allow space in config source names on windows (Tor Lillqvist)
  - Read xml files in larger chunks (Mark McLoughlin)
  - Simplify the handling of --enable-schemas-install (Stepan Kasal)
  - Win32 Fixes (Tor Lillqvist)

 Lots of translation updates.