### What license do themes need to have for distribution?

Could someone specify what license the themes need to have to get
distributed in ikiwiki or Debian? The current included theme seem to be
under the GPLv2. Does the [Creative Commons Attribution 3.0 Unported
License](http://creativecommons.org/licenses/by/3.0/) also work. This way a
lot of free CSS templates could be included, e. g. from
[freecsstemplates.org](http://www.freecsstemplates.org/). --PaulePanter

> Paule, I'd love it if you did that! The only hard requirement on themes
> included in ikiwiki is that they need to be licensed with a [DFSG
> compatable license](https://wiki.debian.org/DFSGLicenses). CC-BY-SA 3.0
> is DFSG; CC-BY is apparently being accepted by Debian too.
> 
> As a soft requirement, I may exersise some discretion about themes that
> require obtrusive attributions links be included on every page of a
> site using the theme. While probably DFSG, that adds a requirement
> that ikiwiki itself does not require. --[[Joey]]

### Once one has enabled the 'theme' plugin in the setup file, how does one use themes?
