Cactus Code Thorn MoL
Authors    : Ian Hawke
CVS info   : $Header$
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Purpose of the thorn:

This thorn provides generic time integrators.
This allows clean coupling when multiple thorns wish to integrate at the
same time.
It also means a physics thorn doesn't have to rewrite its own time
integrator.
This version is designed to work with Mesh Refinement codes as well as
unigrid.