[josm_plugins] add new externals to JOSM core tools

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30121 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
[josm_openinghours] fix regressions

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30122 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4