Add attributions for basemap.at.
-rw-r--r-- 951 extension.json
drwxr-xr-x - i18n
drwxr-xr-x - img
drwxr-xr-x - openlayers
drwxr-xr-x - tools
-rw-r--r-- 18240 wrmap.body.php
-rw-r--r-- 854 wrmap.css
-rw-r--r-- 10925 wrmap.js