anchor.diff:  %% copies of the Software, and to permit persons to whom the
   %% Software is furnished to do so, subject to the following
   %% conditions:
  -%% 
  +%%
   %% The above copyright notice and this permission notice shall be
   %% included in all copies or substantial portions of the Software.
  -%% 
  +%%
   %% THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   %% EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
   %% OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  
positive.code: -behaviour(gen_server).
  
  %% gen_server callbacks
  -export([start_link/0, init/1, handle_call/3, handle_cast/2, 
  	     handle_info/2, terminate/2, code_change/3]).
  
  -export([lookup/3, lookup_urls/0, urls/0]).
  
  
negative.code: %% Copyright (c) 2010 Jacob Vorreuter <jacob.vorreuter@gmail.com>
  %%
  %% Permission is hereby granted, free of charge, to any person
  %% obtaining a copy of this software and associated documentation
  %% files (the "Software"), to deal in the Software without
  