* src/GrampsDbUtils/_ReadXML.py: read region tag in xml
* src/GrampsDb/_GrampsDbWriteXML.py: output region tag in xml (=subsection of picture)
* src/GrampsDb/_GrampsDbConst.py: change env_dir in ENV_DIR
* src/Editors/_EditMediaRef.py: remove bug with coord None
svn: r9057