What's new in at-spi2-core 2.1.5:

* Propertly free DBus error in atspi_accessible_get_process_id.

* Clean up names of some private functions.

* Move DBus interface name constants into atspi-constants.h and make public.

* Remove support for relocated CORBA.

* Fix for BGO#655127: Avoid Python crash for atspi_accessible_get_relation_set.