Potion is free software, released under an MIT license -- the very
  brief paragraphs below. There is satisfaction simply in having
  created this. Please use this how you may, even in commercial or
  academic software. I've had a good time and am want for nothing.
  
                                 ~
  
  Copyright (c) 2008 why the lucky stiff
  
  HOWEVER:
  Be it known, parts of the object model taken from obj.c
    (c) 2007 Ian Piumarta
    <http://www.piumarta.com/software/id-objmodel/> (MIT licensed)
  And, also, the design of the VM bytecode is from Lua
    (c) 1994-2006 Lua.org, PUC-Rio
    <http://lua.org/license.html> (MIT licensed)
    <http://luaforge.net/docman/view.php/83/98/ANoFrillsIntroToLua51VMInstructions.pdf>
  The Mersenne Twister (MT19937)
    (c) 1997-2002, Makoto Matsumoto and Takuji Nishimura (MIT licensed)
    <http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/MT2002/emt19937ar.html>
  Decimal code based on ARPREC, an arbitrary-precision lib (BSD licensed)
    (c) 2003-2009 Lawrence Berkeley Natl Lab
    David H. Bailey, Yozo Hida, Karthik Jeyabalan, Xiaoye S. Li, Brandon Thompson
    <http://crd.lbl.gov/~dhbailey/mpdist/>
  Lastly, khash.h
    (c) 2008, by Attractive Chaos
    <http://attractivechaos.awardspace.com/khash.h.html> (MIT licensed)
  
  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 restriction,
  including without limitation the rights to use, copy, modify, merge,
  publish, distribute, sublicense, and/or sell 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 NONINFRINGEMENT. IN NO EVENT
  SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
  OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT
  OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  SOFTWARE.