Improved new() parameter documentation.

lib/Plack/App/WrapCGI.pm

@@ -107,6 +107,33 @@ PSGI server as a PSGI application.
 See also L<Plack::App::CGIBin> if you have a directory that contains a
 lot of CGI scripts and serve them like Apache's mod_cgi.
 
+=head1 METHODS
+
+=over 4
+
+=item new
+
+  my $app = Plack::App::WrapCGI->new(%args);
+
+Creates a new PSGI application using the given script. I<%args> has two
+parameters:
+
+=over 8
+
+=item script
+
+The path to a CGI-style program. This is a required parameter.
+
+=item execute
+
+An optional parameter. When set to a true value, this app will run the script
+with a CGI-style C<fork>/C<exec> model. Note that you may run programs written
+in other languages with this approach.
+
+=back
+
+=back
+
 =head1 AUTHOR
 
 Tatsuhiko Miyagawa