add highlighting and folding for POD documentation

demo/kitchen-sink/docs/perl.pl

@@ -1,4 +1,8 @@
 #!/usr/bin/perl
+=begin
+ perl example code for Ace
+=cut
+
 use strict;
 use warnings;
 my $num_primes = 0;
@@ -30,3 +34,4 @@ for my $p (0 .. ($num_primes-1))
     print $primes[$p], ", ";
 }
 print "\n";
+