As it's somewhat boring and ankward to build the tutorial project using copy/paste techniques I set up some repositories at GitHub. I split the source in two separate repos.
There's a repo for the code related to this blog. For now it contains just different parts of the Placidity tutorial. I also added links to each part of the tutorial series so it's easy to access the code in question.
I use the other repo for development of Placidity between blog posts and for possible development after I finish the series. In case you want to fork it or something, see GitHub documentation for instructions. As far as I understand that should be relatively easy, thanks to git. :)