Added support for setting rootPrefix.
Revert "Added support for setting rootPrefix."

This reverts commit 6f3870a09c0c7ceefe8823c7f571f4c865ee700d.
Added support for including the rootPrefix attribute in the OutputeWriter settings.
Revert "Added support for setting rootPrefix."

This reverts commit 6f3870a09c0c7ceefe8823c7f571f4c865ee700d.
Added support for including the rootPrefix in the OutputWriter settings section.
Merge pull request #103 from paulcgt/master

Support for rootPrefix in yaml2jmxtrans.py