1.12.1 Stable

This is a bugfix release for the recent 1.12.0 release. Thanks to Leiaz tackling several complicated issues. Most prominent is a hopefully solved issue with the pane sizing with maximized window. Last but not least we have Italian and Indonesian translation updates.

Changes:

* Fixes #562: Lintian spelling errors
  (reported by Paul Gevers)
* Fixes #563: Appstream data has new format
  (patch by Paul Gevers)
* Fixes #572: Doesn't remember some sort orders
  (reported by geplus)
* Fixes #504: Fix assertions/crashes on changing view layouts
  (Leiaz)
* Fixes #573: Workaround to avoid GtkPaned shrinking
  (Leiaz)

* #566: Update of Italian translation (Gianvito Cavasoli)
* #566: Update of Italian default feed list (Gianvito Cavasoli)
* #514: Update of Indonesian translation (Samsul Ma'arif)
* #514: Added Indonesian default feed list (Samsul Ma'arif)
* Update of German translation