More expansion of the lib.dispersionns_cpmg_2site_expanded module docstring for reference.

The link https://gna.org/task/?7712#comment8 to the p3.analytical script in the Gna! tasks has been
added and the contents of the sim_all.tar file funNikolai.m has been copied into the docstring as
well.
Merged revisions 21150 via svnmerge from 
svn+ssh://bugman@svn.gna.org/svn/relax/trunk

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  r21150 | bugman | 2013-10-17 09:05:49 +0200 (Thu, 17 Oct 2013) | 3 lines
  
  Epydoc docstring formatting fixes.
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