r52153: implement part attribute with values "header" and "footer" to put rows in thead or tfoot instead of tbody of table
r52163: stop etemplate_widget_template::instance from returning a stdClass object for a not found template after content-expanding, leading to a fatal error in etemplate_widget line 338
r52175: there should be no validation for disabled widgets
r52176: $cont is NOT root but current name-space in old eTemplate, leaving now identical $_cont for now
r52194: fixed eT2 data returned from client for case where name-space contains more then one component eg. "nm[rows]"
r52195: fixed not run validation on server-side for templates included via template tag
r52196: implement formatting of numbers in read-only widget
