Log Message:
Update py-at-spi2 to 2.6.0

* Install caret focus tracker into $bindir, rather than $pythondir/examples.
  for the rational see https://bugzilla.gnome.org/show_bug.cgi?id=682636
* Fix incorrect FSF address in file headers.
* Fix for bug #683302 - Missing argument for set_current_value method
* Include interim focus tracker as an example.
* Fix autogen.sh for non-sourcedir build.
* Add getLocalizedName for actions.