Suggestion for user manual update.

Dancer::Script::Update

use Text::Buffer;

#Add the following to Dancer::Script
sub upgrade { 
    my $self = shift;
    my $file = catfile($self->{path},$self->{appname},'lib',$self->lib_path},$self->{lib_file});
    my $deprecated = $self->deprecated;

    my $text = Text::Buffer->new(-file=>"$file");

    foreach (keys ${$deprecated}){                   
		my $linenum = $text->find("/$_/");
		$text->goto($linenum);
                $text->append("# ${$deprecated}{$_}");
     }
	$text->save("$file.new");
	# Write the file as lib.pm.new just like catalyst.pl
};



sub deprecated {
    my $self = shift;

    return {
    # List of deprecated functions and options for Dancer. 
	# They should be added manually.
	'layout' => "Deprecated. Use set: set layout => 'user';",
	'logger' => "Deprecated. Use set logger = 'console'; to change current logger engine.",
	'mime_type' => "Deprecated. Please see 'mime' in Dancer's documentation.",
	'render_with_layout' => "Deprecated. you should be using 'engine'.",
	'set_cookie' => "Soon to be deprecated. See Dancer::Cookie.",

	}
};