[AppStream] AppStream 0.12.0 released!

[Matthias Klumpp]

Hello!
It is finally time for another AppStream release - this release got
quite a bit bigger than I wanted, so next time you can expect a faster
and smaller release.
It features a few additions to the specification, as well as quite a
large bunch of bugfixes.
The default AppStream format version is now the in-development version 0.12.

Even though this is a feature release, all new additions are fully
backwards compatible, and the release contains some important bugfixes
as well, especially for the Qt bindings.

Tarballs available here: http://www.freedesktop.org/software/appstream/releases

Version 0.12.0
~~~~~~~~~~~~~~
Released: 2018-04-04

Features:
 * Implement release types (Matthias Klumpp)
 * qt: Support release types (Matthias Klumpp)
 * Update static data lists (Matthias Klumpp)
 * Make as_str_replace use as_gstring_replace internally (Matthias Klumpp)
 * spdx: Add some compatibility workarounds for SPDX 3.0 (Matthias Klumpp)
 * validator: Validate SPDX license expressions for metadata_license
(Matthias Klumpp)
 * apt: Add config snippets to enable icon downloads (Matthias Klumpp)
 * yaml: Ensure all string values have whitespaces stripped (Matthias Klumpp)
 * Make as_component_get_launchables public API (Matthias Klumpp)
 * Implement support for requires/recommends (Matthias Klumpp)
 * Add recommends/requires data to the cache (Matthias Klumpp)
 * Add a quick way to check if a version satisfies an AsRelation
requirement (Matthias Klumpp)
 * ascli: Properly document the --no-net flag (Matthias Klumpp)
 * ascli: Allow to disable network acces via an environment variable
(Matthias Klumpp)
 * apt: Support 48x48px icons (Matthias Klumpp)
 * yaml: Make Requires/Recommends data more compact and easier to emit
(Matthias Klumpp)
 * validator: Validate requires/recommends tags (Matthias Klumpp)
 * Default to format version 0.12 (Matthias Klumpp)

Specification:
 * spec: Add a "type" property to <release/> tag. (Jehan)
 * spec: Initial draft for requires/recommends (Matthias Klumpp)
 * spec: Document the YAML Rquires/Recommends fields (Matthias Klumpp)
 * spec: Clarify that the memory requirement uses MiB as unit (Matthias Klumpp)

Bugfixes:
 * qt: Implement missing constructors (Aleix Pol)
 * apt: escape the icon scale factor as it is using the arobase
character (Corentin Noël)
 * Check plain language string in as_component_localized_get as well
(Antonio Rojas)
 * qt: Define location and soname for all configurations, not just
Debug (Gabriel Souza Franco)
 * Never override high-quality data with incomplete .desktop data
(Matthias Klumpp)
 * Make data update script work with recent SPDX (Matthias Klumpp)
 * Add a timeout to URL validity checks (Matthias Klumpp)

Translation:
 * Ukrainian
   - AB
   - Yuri Chornoivan
 * Norwegian Bokmål
   - Allan Nordhøy
 * Swedish
   - Anders Jonsson
 * Indonesian
   - Andika Triwidada
   - se7entime
 * German
   - Andreas Kleinert
 * Hungarian
   - Balázs Meskó
   - Balázs Úr
 * Chinese (Traditional)
   - Chang-Chia Tseng
 * Russian
   - Igor
 * Finnish
   - Juhani Numminen
 * Korean
   - Jung-Kyu Park
 * Portuguese (Brazil)
   - Luiz Fernando Ranghetti
   - Rafael Fontenelle
   - Rafael Henrique Mendes de Oliv
 * Slovak
   - Matúš Baňas
 * Arabic
   - Michal Čihař
   - Mutaz Tayyeb AbuSaad
 * Italian
   - Milo Casagrande
 * Lithuanian
   - Moo
 * Czech
   - Pavel Borecki
 * Polish
   - Piotr Drąg
 * Catalan
   - Robert Antoni Buj Gelonch