What's new in at-spi2-core 2.1.90:

* Fixed a memory leak on DBus errors.

* Added org.a11y.Status.IsEnabled (currently a read-only property) to the bus
  launcher.

* Fix for BGO#656004: atspi_accessible_get_relation_set returns a GArray again.

* Numerous documentation fixes from Aline Bessa.

* CLean up device listeners from disconnected applications.

* Fix for BGO#657585: Do not crash when the bus launcher is unable to open the
  X display.