Fixed problem with building TW under Windows

Fixes #717

The issue was that under Windows we generate text nodes that contained
CRLF as a linebreak (rather than just LF as usual).

The subtle problem is that when these strings are placed in the DOM via
createTextNode(), the CR character is treated as a printable character,
not whitespace. When creating DOM notes with innerHTML or as part of a
static HTML document the HTML parser will strip out the CR characters.

The hacky solution is to manually remove CRs before building the text
node.

core/modules/widgets/text.js

@@ -30,8 +30,9 @@ TextNodeWidget.prototype.render = function(parent,nextSibling) {
 	this.parentDomNode = parent;
 	this.computeAttributes();
 	this.execute();
-	var text = this.getAttribute("text",this.parseTreeNode.text),
-		textNode = this.document.createTextNode(text);
+	var text = this.getAttribute("text",this.parseTreeNode.text);
+	text = text.replace(/\r/mg,"");
+	var textNode = this.document.createTextNode(text);
 	parent.insertBefore(textNode,nextSibling);
 	this.domNodes.push(textNode);
 };