Remove support for archiving

I'm not going to use it. I'm not going to finish it. And it feels like
a lot of work for just a little gain. So let's drop it while we can,
because it was never actively advertised.

Signed-off-by: Frank Terbeck <ft@bewatermyfriend.org>
Add support for a ‘template’ method

It's based on the Perl Template Toolkit, and it's an optional
dependency. Documentation is not available, yet, since the method
lacks dependency resolution at this time, which makes its behaviour
differ from the other methods.

Signed-off-by: Frank Terbeck <ft@bewatermyfriend.org>