Add CGAL pre-4.11 support back to e/a/alphashapes3d-periodic
From: Dmitriy Morozov <morozov@cs.duke.edu>Date: Thu, 28 Feb 2008 05:33:34 -0500State: fixedSubject: Two simulatorsMessage-Id: <c664b2f69b5f6ea3-0-artemis@metatron>Consider using two simulators instead of one to make sure that trajectorychanges are processed before simplex swaps.