Fix bug in package of generated OMEXMLMetadataImpl

The package should be ome.xml.meta now, no longer ome.xml.ome.
Merge pull request #1022 from ctrueden/dev50/ome-xml-package-bug

OME-XML package bug-fix
Update auto-generated documentation

Repository: openmicroscopy/bioformats
Already up-to-date.

Generated by BIOFORMATS-5.0-latest-docs-autogen#192 (http://ci.openmicroscopy.org/job/BIOFORMATS-5.0-latest-docs-autogen/192/)