* develop-ascraeus:
[ticket/13553] Add a method to the controller helper to display a message
[prep-release-3.1.3] Add changelog for 3.1.3-RC1
[prep-release-3.1.3] Prepare Changelog
[prep-release-3.1.3] Add migration for 3.1.3-RC1
[prep-release-3.1.3] Update version to 3.1.2-RC1
Conflicts:
build/build.xml
phpBB/includes/constants.php
phpBB/install/schemas/schema_data.sql
phpBB/styles/prosilver/style.cfg
phpBB/styles/subsilver2/style.cfg