[Users] Initial data documentation

[Erik Schnetter]

As discussed in our telecon this morning, I wrote a wiki page about  
setting up an initial data thorn for <http:// 
docs.einsteintoolkit.org>.  The last section (setting up and running  
with an example parameter file) is still missing.

I would be happy if someone took the liberty to proofread, correct,  
simplify, and possibly complete my explanations.

-erik

-- 
Erik Schnetter <schnetter at cct.lsu.edu>   http://www.cct.lsu.edu/~eschnett/