A thorn that calculates the extrinsic curvature from the three-metric,

lapse, and shift.  Best used with the ID filereader.


git-svn-id: http://svn.einsteintoolkit.org/cactus/EinsteinAnalysis/CalcK/trunk@2 f47d718b-0e4f-0410-8445-f2f96c8ccefb

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+CVS info   : $Header$
+
+Cactus Code Thorn CalcK
+Thorn Author(s)     : Erik Schnetter <schnetter@aei.mpg.de>
+Thorn Maintainer(s) : Erik Schnetter <schnetter@aei.mpg.de>
+--------------------------------------------------------------------------
+
+Purpose of the thorn:
+
+Calculate the extrinsic curvature K_ij from several time levels of the
+three-metric gamma_ij, lapse alpha, and shift beta^i.