FeatPost-0.8.7 has documentation in the "doc" directory: 
  "featpostmanual.pdf" gathers all that I ever wrote about FeatPost;
  "Exemplifier.pdf" gathers a very big set of MetaPost figures.
   
Perhaps, it may be better for you to start with plain MetaPost and (La)TeX: 
  "metapostpropaganda.pdf" is a wide-range tutorial.
  The "doc/metapostpropagandafiles" directory contains additional examples.

But even if you already know that this is what you want, you may still find 
nice surprises in the "MPexamples.html" file.

% This is free software; you can redistribute it and/or
% modify it under the terms of the GNU General Public License
% as published by the Free Software Foundation; either version 3
% of the License, or (at your option) any later version.

% This set of macros is distributed in the hope that it will be useful,
% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
% GNU General Public License for more details.

2013/JUL/30                                                     L. Nobre G. 

