As metadata is in the same file as the one for a serializer, the elements from our namespace need a prefix.
Merge pull request #87 from mvrhov/xmlDriverFix

As metadata is in the same file as the one for a serializer, the element...
Add file resources into the metadata for xml an yaml drivers, so cache can be rebuild when needed
Merge pull request #88 from mvrhov/cachedMetadataRebuild

Fix cache rebuild for xml and yaml drivers