Changed implementation of WeightedRips to store simplex values (max distance between simplices' vertices) as an invisible layer on top of each simplex object, so that the data() field of WeightedRips has been freed for use by the users again.

From: Dmitriy Morozov <morozov@cs.duke.edu>
Date: Wed, 06 Feb 2008 16:45:13 -0500
State: new
Subject: About section in README
Message-Id: <e6d9deee8fbd81a5-0-artemis@metatron>

Add "About" section to the README file.