installing and using autodoc

Hi,

I'm interested in using postgresql_autodoc to document my postgres databases
on Linux, but I'm unable to find any information on how to install the
program or use it.  Can someone point me in the right direction?

I've downloaded postgresql_autodoc-1.25.tar.gz from
http://www.rbt.ca/autodoc/releasenotes.html, un-ziped it and have no idea
what to do.  Does it need to be compiled?  If so, what command do I use?  If
not, what do I do to configure the program?

Thanks in advance,
Courtenay