[josm_opendata] handle special unicode characters

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30095 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_opendata] update plugin and toulouse module

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30097 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_opendata] update plugin and toulouse module

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30098 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4