[AppStream] AppstreamGlib 0.7.15

[Richard Hughes]

Version 0.7.15
~~~~~~~~~~~~~~
Released: 2019-02-28

Notes:
 - The libappstream-builder shared library is no longer installed
(Richard Hughes)

New Features:
 - Add as_content_rating_get_rating_ids() (Philip Withnall)
 - Add as_release_set_install_duration() (Richard Hughes)
 - Add as_utils_vercmp_full() for gnome-software (Richard Hughes, Kalev Lember)
 - Add support for CONTACT URLs (Robert Ancell)
 - Add support for per-release URLs (Richard Hughes)
 - Add support for SOURCE URLs (Richard Hughes)
 - Make as_content_rating_attribute_to_csm_age() public (Philip Withnall)

Bugfixes:
 - Add missing OARS → CSM mappings (Philip Withnall)
 - Add some thread safety to AsApp and AsStore (Kalev Lember)
 - Do not overwrite the project group using heuristics if already set
(Richard Hughes)
 - Recognise uncompressed Arch packages (Richard Hughes)
 - Remove unnecessary gtk dependency for builder (Mart Raudsepp)
 - Return G_IO_ERROR_NOT_FOUND when loading fails (Philip Withnall)
 - Tokenize the ID when adding search tokens (Kalev Lember)

Richard.