FIX: Handle the unquoting of namespaces within Configuration.getvar() properly. BUGS: The "ref" namespace is handled specially and not yet compatible with escaping some character of the "ref:" marker.

{"__comment1": "Comment 1",
 "key1": "the value",
 "key2": 2,
 "key3": 5.7,
 "key4": true,
 "key5": false,
 "key6": 255,
 "__comment2": "Comment no 2",
 "key7": "Umlaute: ÄÖÜäöüß"
}