[AppStream] AppStream 0.11.2 released!

[Matthias Klumpp]

This is primarily a bugfix release, with some code improvements on the
caching logic and memory usage.
Tarballs available here: http://www.freedesktop.org/software/appstream/releases

Version 0.11.2
~~~~~~~~~~~~~~
Released: 2017-07-18

Features:
 * cache: Refactor cache functions (Matthias Klumpp)
 * Deduplicate origin/locale/arch with AsContext (Matthias Klumpp)
 * Get rid of a couple of internal helper methods (Matthias Klumpp)
 * cli: When using convert, always assume collection style for YAML
(Matthias Klumpp)

Specification:
 * Adjust docs to clearly state that licenses are SPDX expressions
(Harald Sitter)

Bugfixes:
 * qt: Improve Icon QDebug information (Aleix Pol)
 * Resolve crash when serializing lots of XML documents (Matthias Klumpp)
 * xml: Don't truncate translated entries after encounting a wrong
locale (Matthias Klumpp)
 * Set a real locale if locale is set to "ALL" (Matthias Klumpp)
 * validator: Make ending dot in component name only a pedantic issue
(Matthias Klumpp)


Translation:
 * Arabic
   - Heba ahmed
 * Russian
   - Igor
 * Italian
   - Milo Casagrande
 * Lithuanian
   - Moo
 * Spanish
   - Piotr Drąg