Re: [development] Move all core modules into their own directories.

Neil Drumm wrote:

I would actually be okay with removing the whole engine system and simply doing PHPTemplate only. Sure theme engines are a nice feature, but how many are maintained and what % of themes are PHPTemplate?

I don't use anything but PHPTemplate, but I think that we want to keep the engine system. Why don't we just leave the theme_ function inclusion mechanism to the engine? PHPTemplate will require separate files, and other engines can do what they please.