add support for twitter buttons

config.php-dist

@@ -171,6 +171,9 @@
 	define('SPHINX_INDEX', 'ttrss');
 	// Index name in Sphinx configuration
 
+	define('ENABLE_TWEET_BUTTON', false);
+	// Enable 'tweet this' button for articles
+
 	define('CONFIG_VERSION', 20);
 	// Expected config version. Please update this option in config.php
 	// if necessary (after migrating all new options from this file).