Hi all,
GJ doesn't use a new template system, but there were some changes (which are not complete)
We used patTemplate before and use it now. In the current release it is directly included in the Groupjive package. We decided this step, because we had some trouble with compatibility issues and it seems patTemplate will not be included in further Joomla versions (and I don't know if it is a part of Mambo).
However, the template is not processed directly like in older versions of Groupjive. Due the fact that we have a plugin system now, we decided to collect all template informations and process the template lastly when all plugins and the core of Groupjive added their parts to the template.
So, now it is possible to add special content to a group layout by using a plugin.
Thatswhy we added a template named skeleton.tmpl. This template contains all the blocks that can be filled. The templateprocessor puts the content to the specific block (defined now hardcoded in the code - later a group manager can decide where the content is shown).
The basic template functionality from former Groupjive versions is the same. You can create a new templatefolder and only put the changed files in there. So you can have a new template which only has a CSS file.
If you have questions or feature requests, just ask.
If you are a designer or themes guru feel free to help us creating a new standard template
Cheers,
Micha