JOSM/plugins: harmonize strings for "(house number) increment"



git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30067 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4
JOSM/tracer2: Add link to wiki.

git-svn-id: http://svn.openstreetmap.org/applications/editors/josm/plugins@30068 b9d5c4c9-76e1-0310-9c85-f3177eceb1e4