Cactus Code Thorn Punctures
Author(s)    : Erik Schnetter 
Maintainer(s): Erik Schnetter 
Licence      : LGPL
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1. Purpose

Provide multi-black-hole initial conditions based on the "puncture" idea:

Steven Brandt, Bernd Brügmann, "A simple construction of initial data
for multiple black holes", Phys. Rev. Lett. 78:3606-3609, 1997, DOI:
10.1103/PhysRevLett.78.3606, arXiv:gr-qc/9703066.