ConfigurationMergeHandler allows nodeset fragments to be merged into master set, using XPath to define the element(s) to be updated.
Prevents the prefix from being set to unknown and causing a Sax parse exception (ref: mliggett@btisystems.com).
Merge branch 'master' of https://github.com/btisystems/jnc
Merge pull request #1 from sjames-iberis/master

1) Support for merging configuration. 2) Avoid SAX Parser exception.