just one editable element?
Is it possible just to make one article and it shows up on every page automatically? And it would be nice to edit the content in C5 as well.
You can either abstract out the footer file in your template like they do in the default theme under concrete/default/default.php this line:
You can edit this in your theme which you install in the themes folder, not concrete/themes.
That is one way and a great place to put your google analytics.
Another way is to make an area down there in which you can put a block, i'd say a content block. Install your theme, then you can edit your page type, and add your text down there (or images or whatever). If you want to change this site-wide, you need to change it in the page-type and then click the block in the page type and it brings up a change on children pages or something along those lines. Click that and all the blocks that you edit there will have their changes reflected on every page that was made with that page type.
that lets you add a block in one place and have it show up everywhere.
I realized that I had to edit the main pagetype, and added a content. After added the content, I clicked on the block and picked which childpages for this content.
I might create a screencast of this. Anyway, C5 rocks!