Fix pasring xml values in identify

On image:
http://beta.images.theglobeandmail.com/media/mobile/images/iphone.icon.highres.png
got values to parse:
```
    Software: Adobe Fireworks CS3
    XML:com.adobe.xmp: <?xpacket begin="   " id="W5M0MpCehiHzreSzNTczkc9d"?>
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="Adobe XMP Core 5.0-c060 61.134777, 2010/02/12-17:32:00        ">
   <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
      <rdf:Description rdf:about=""
            xmlns:xmp="http://ns.adobe.com/xap/1.0/">
         <xmp:CreatorTool>Adobe Fireworks CS5 11.0.0.484 Macintosh</xmp:CreatorTool>
         <xmp:CreateDate>2010-10-18T17:05:17Z</xmp:CreateDate>
         <xmp:ModifyDate>2010-12-21T19:56:18Z</xmp:ModifyDate>
      </rdf:Description>
      <rdf:Description rdf:about=""
            xmlns:dc="http://purl.org/dc/elements/1.1/">
         <dc:format>image/png</dc:format>
      </rdf:Description>
   </rdf:RDF>
</x:xmpmeta>
```

```parseIdentify``` function think ```<x:xmpmeta```  is new document root and skips previous data.

Fast fix simply ignore xml tag lines.