Overview

rst2pdf worked with docutils<=0.8.1

To make PIL with zlib support, its setup.py must be changed to account weird
places where zlib put in debian.  See in build directory.

Or zlib (and others) can be linked to virtualenv's ./lib::

   ln -s /usr/lib/x86_64-linux-gnu/libz.so ./lib/
   ln -s /usr/lib/x86_64-linux-gnu/libjpeg.so ./lib/
   ln -s /usr/lib/x86_64-linux-gnu/libfreetype.so ./lib/