A new excision thorn.

git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinInitialData/NoExcision/trunk@2 4ec1db94-0e4f-0410-ada3-8bed251432c9

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+CVS info   : $Header$
+
+Cactus Code Thorn NoExcision
+Thorn Author(s)     : Erik Schnetter <schnetter@aei.mpg.de>
+Thorn Maintainer(s) : Erik Schnetter <schnetter@aei.mpg.de>
+--------------------------------------------------------------------------
+
+Purpose of the thorn:
+
+Overwrite the regions near a singularity with "something else",
+possibly flat space, ignoring the constraints.  This is instead of
+excision.
+
+This method is modelled after an idea by Dennis Pollney, following an
+serendipitous bug by Ian Hawke.  The word "serendipity" was coined by
+Horace Walpole in the 18th century, from the Persian fairy tale "The
+Three Princes of Serendip" (www.wikipedia.org).