* summary and subject messages now uses wiki text rather than raw HTML

* summary and subject messages now uses wiki text rather than raw HTML
* Added the colon in summary, subject and subject-preview messages rather than using colon-separator
* Changed the note in RELEASE-NOTES to also point to bug 212
* Also escaped other messages that weren't escaped
* Added new $attribs option to Xml::label(), using it in Xml::inputLabel(), Xml::inputLabelSep(), Xml::checkLabel() and Xml::radioLabel()
* $fname -> __METHOD__
* Whitespaces tweaks