Add create param to fieldmangler.js using x-tiddler deserializer. (public domain)

fieldmangler.js:execute()

FieldManglerWidget.prototype.execute = function() {
	// Get our parameters
	this.mangleTitle = this.getAttribute("tiddler",this.getVariable("currentTiddler"));
	this.createText  = this.getAttribute("create",false); 
	// Process create param
	if(this.createText) { 
	  var createTiddler = $tw.wiki.deserializeTiddlers("application/x-tiddler",this.createText);
	  createTiddler[0]['title'] = this.mangleTitle;
	  if(!this.wiki.tiddlerExists(this.mangleTitle))
		this.wiki.addTiddler(createTiddler[0]);
	}
	// Construct the child widgets
	this.makeChildWidgets();
};