Browse the manual online
You may download the manual (in HTML) for off-line reading here :
As a tar ball : manual.tar.gz
As a zip archive : manual.zip
You may start browsing the manual off-line from the manual/index.html file.
The manual source (TeX) is also available for download
here . You may need
LaTeX 2e, and the latex2html program to build it from source.