Merge branch 'master' into feature_pluginPreview

Classes/Utility/ExtensionUtility.php

Classes/ViewHelpers/Backend/ControlViewHelper.php

Classes/ViewHelpers/Backend/EditOnClickViewHelper.php

Classes/ViewHelpers/Backend/TranslationLinksViewHelper.php

Configuration/Commands.php

Configuration/Extbase/Persistence/Classes.php

Configuration/TCA/Overrides/pages.php

Configuration/TCA/Overrides/pages_language_overlay.php

Configuration/TCA/tx_sgnews_domain_model_author.php

Configuration/TypoScript/Common/setup.typoscript

README.md

Resources/Private/Templates/Backend/Index.html

Upgrade.md

composer.json

ext_emconf.php

ext_localconf.php

ext_tables.php

ext_tables.sql