CAF::Render to render structured text

euhm, really?

how about i add
```perl
no strict 'refs';
foreach my $i (qw(error warn info verbose debug)) {
*{$i} = sub {
        my ($self, @args) = @_;
        $self->{log}->$i(@args) if $self->{log};
    }
}
use strict 'refs';
```

and use simply `$self->info()`? (could even make add it in `CAF::Object`?)