Call drupal's render() function after the return of theme_node

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Fix #886766: Make unreadable custom CSS file a warning and not an error when submitting the settings form

Fix #881074 by ceme: use SCRIPT_FILENAME instead of DOCUMENT_ROOT when replacing image paths for local access

Fix #763810: Configure module weights to ensure that the core module is always called before the others

Fix #715800: type-specific settings act as default settings only, not as a type-wide configuration switch