Packaging functionality in Themes

[joakim]

I converted a package of mine that I use to avoid procrastination to use
Emacs Themes: https://github.com/jave/zen-mode

I think themes could be a really powerful mechanism to avoid
bikeshedding and allow Emacs to be easy to setup for different
tastes.

The things I found difficult to do when converting my package was:

- It's unclear how to programmatically enable several themes at the same
time. I want this because I water to be able to set colours separately
from functionality for instance.

- How I install the themes. Now I just copy them by hand to ~/.emacs.d.

We can use Zen-mode to illustrate how to package functional themes in
ELPA if you like, but then I'd want some feedback to improve the quality of the
package.

-- 
Joakim Verona