License: Paul Hsieh's Public Domain Option
 Unless covered by another accompanying license, source code shown on my
 website can be used freely under the derivative license, (and may be
 distributed under a public domain license, whether compiled into another
 program or not, for example) however the font, comments, colors or any
 layout details associated to that source code in its exposition are covered
 by the exposition license.
 .
 Extracted from: http://www.azillionmonkeys.com/qed/weblicense.html
