XPath in MARKUP_VALUE

Hi,

I am using Xml-Region-Analyzer in one of my little project and I had an issue with a MARKUP_VALUE containing a XPath (such as <xml>/root</xml> ).

I fixed this issue for my own purpose. I therefore propose you thsi modification as a pull request. I also amended the JUnit class to include this case.

Thanks again for making this code available!

Regards,
Pierre.