Merged revisions 21103-21105 via svnmerge from 
svn+ssh://bugman@svn.gna.org/svn/relax/trunk

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  r21103 | bugman | 2013-10-15 10:43:03 +0200 (Tue, 15 Oct 2013) | 6 lines
  
  Created a unit test for the lib.linear_algebra.matrix_exponential module.
  
  This module does not exist yet, but it will be used to replace the scipy.linalg.expm() function use
  in the relaxation dispersion branch.
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  r21104 | bugman | 2013-10-15 11:07:19 +0200 (Tue, 15 Oct 2013) | 3 lines
  
  Loosened the lib.linear_algebra.matrix_exponential.matrix_exponential() unit test checks.
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  r21105 | bugman | 2013-10-15 11:07:54 +0200 (Tue, 15 Oct 2013) | 5 lines
  
  Implemented the lib.linear_algebra.matrix_exponential.matrix_exponential() function.
  
  This handles square matrices in either complex or real form.
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