Fix Windows file references for unix

FileRefs.groovy
May 2008 by John Green.

Find and fix code developed on Windows so it has file references which are portable to unix.

Does the following for RUN *.p, RUN *.w, and for include file references:

USAGE

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Released under the terms of the Eclipse Public License v1.0:
http://www.eclipse.org/legal/epl-v10.html