You need to install Pandoc, a Markdown to TeX/HTML/etc. processor.
On Debian / Ubuntu:
$ apt-get install pandoc
On Mac OS X:
$ brew install cabal-install
$ cabal install pandoc
(you will probably need to fiddle with your PATH afterwards, in my case I'm adding $HOME/.cabal/bin to it in my .profile).
Type "make".
To make it easier to access the deliverables, the PDF are stored in Git.
So type "make ; make clean" before commit and that should do it.