Implemented ImageZigzagPersistence
* Changed ZigzagPersistence to support a visitor, and implemented
ImageZigzagPersistence
* examples/rips/rips-zigzag now computes using ImageZigzagPersistence
* PersistenceDiagram no longer records zero persistence pairs
* Added utilities/memory.h with report_memory() function
From: Dmitriy Morozov <morozov@cs.duke.edu>
Date: Tue, 11 Mar 2008 04:05:25 -0400
State: fixed
Subject: Scale fitness
Message-Id: <cff004eda75a26c2-0-artemis@metatron>
When computing fitness persistence, divide all values by the maximum fitness.
That way it's possible to compare persistence diagrams for runs in different
environments.