add experimental support for Twitter OAuth and Twitter feeds (bump schema)

prefs.js

@@ -1704,4 +1704,24 @@ function editLabel(id, event) {
 	}
 }
 
+function clearTwitterCredentials() {
+	try {
+		var ok = confirm(__("This will clear your stored authentication information for Twitter. Continue?"));
 
+		if (ok) {
+			notify_progress("Clearing credentials...");
+
+			var query = "?op=pref-feeds&subop=remtwitterinfo";
+
+			new Ajax.Request("backend.php", {
+				parameters: query,
+				onComplete: function(transport) { 
+					notify_info("Twitter credentials have been cleared.");
+					updateFeedList();
+				} });
+		}
+
+	} catch (e) {
+		exception_error("clearTwitterCredentials", e);
+	}
+}