* Better compliance with XSD regexps (when transforming to Posix regexps)

* Added `\p{L}` and `\p{N}`
   * Added escaping of `$`
* Added regexp [test/test_pattern.sh]

test/lib.sh

@@ -31,6 +31,7 @@ if [ -f ./site.sh ]; then
     # test skiplist.
     for f in $SKIPLIST; do
 	if [ "$testfile" = "$f" ]; then
+	    echo ...skipped
 	    return -1 # skip
 	fi
     done