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: Mon, 25 Feb 2008 11:29:27 -0500
State: new
Subject: Efficient EventQueue
Message-Id: <ebda8db3f9908e33-0-artemis@metatron>
Change EventQueue to an efficient implementation, e.g., using a Fibonacci heap.