fix bug by adding nocdata option to parsing of stylesheet by libxmljs

see issue: #3

And solution found here:
https://rt.cpan.org/Public/Bug/Display.html?id=29572

README.md

@@ -42,7 +42,7 @@ It is possible to work with libxmljs documents instead of strings:
 var lixslt = require('libxslt');
 var libxmljs = require('libxmljs');
 
-var stylesheetObj = libxmljs.parseXml(stylesheetString);
+var stylesheetObj = libxmljs.parseXml(stylesheetString, { nocdata: true });
 var stylesheet = libxslt.parse(stylesheetObj);
 
 var document = libxmljs.parseXml(documentString);

index.js

@@ -35,7 +35,7 @@ exports.parse = function(source, callback) {
 	// stylesheet can be given as a string or a pre-parsed xml document
 	if (typeof source === 'string') {
 		try {
-			source = libxmljs.parseXml(source);
+			source = libxmljs.parseXml(source, { nocdata: true });
 		} catch (err) {
 			if (callback) return callback(err);
 			throw err;

test/libxslt.js

@@ -154,21 +154,14 @@ describe('node-libxslt', function() {
 			});
 		});
 	});
-});
 
-describe('node-libxslt disable-output-escaping issue', function() {
-  it('should apply a stylesheet to a xml file', function() {
-    var xmlToTest = fs.readFileSync('test/resources/disable-output-escaping.xml');
-    var xsltXmlToTest = fs.readFileSync('test/resources/disable-output-escaping.xsl');
-    var expectedOutput = fs.readFileSync('test/resources/disable-output-escaping.output').toString();
-    var xmlDoc = libxmljs.parseXml(xmlToTest);
-    var xsltXmlDoc = libxmljs.parseXml(xsltXmlToTest);
-    var xsltDoc = libxslt.parse(xsltXmlDoc);
-
-    var resultXml = xsltDoc.apply(xmlDoc);
-    var resultString = resultXml.toString();
-
-    resultString.should.be.type('string');
-    resultString.should.match(expectedOutput);
-  });
+	describe('disable-output-escaping attribute', function() {
+		it('should be interpreted by a stylesheet', function() {
+			var stylesheetStr = fs.readFileSync('test/resources/disable-output-escaping.xsl', 'utf8');
+			var stylesheetEsc = libxslt.parse(stylesheetStr);
+			var result = stylesheetEsc.apply('<root/>');
+			result.should.match(/<foo\/>/);
+			result.should.match(/&lt;bar\/&gt;/);
+		});
+	});
 });

test/resources/disable-output-escaping.xsl

@@ -1,6 +1,5 @@
 <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:template match="root">
-    <xsl:value-of select="content" disable-output-escaping="yes"/>
     <xsl:text disable-output-escaping="yes"><![CDATA[<foo/>]]></xsl:text>
     <xsl:text disable-output-escaping="no"><![CDATA[<bar/>]]></xsl:text>
   </xsl:template>