relax SVN archive

Loosened the checks for the Relax_disp.test_hansen_cpmg_data_to_ns_cpmg_2site_star_full system test.

This is to allow the test to pass on 32-bit Linux systems.

Fix for the lib.dispersion.cr72 module for early Python versions.

For Python 2.5 and earlier, the math.acosh() function does not exist. Therefore the numpy
equivalents are now being used.

Updated the Relax_disp.test_hansen_cpmg_data_to_ns_cpmg_2site_star_full system test.

This is for the changes of r21191.

Shifted all of the numerical dispersion code to use the internal matrix power function.

Instead of using the numpy.linalg.matrix_power() function, the relax
lib.linear_algebra.square_matrix_power() function is being used instead. This allows the code to
run on many older systems, as the numpy function is relatively new.

Removed an unused import.

Elimination of the relaxation dispersion system test tearDown() method.

The functionality is fully covered by the base system test method.

Merged revisions 21187 via svnmerge from
svn+ssh://bugman@.../svn/relax/trunk

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r21187 | bugman | 2013-10-18 20:12:35 +0200 (Fri, 18 Oct 2013) | 5 lines

The test_suite.clean_up.deletion() function can now handle the case of missing files and directories.

This problem was occurring in the relax_disp branch for some of the system tests.
........

The test_suite.clean_up.deletion() function can now handle the case of missing files and directories.

This problem was occurring in the relax_disp branch for some of the system tests.

Fix for the test_suite.clean_up.deletion() method for another MS Windows problem.

Sometimes the failed rmtree() call actually deletes the files and throws the WindowsError error.
Therefore the second rmtree() call will throw another WindowsError for the missing files. This is
now caught.

Fix for the relaxation dispersion system test tearDown() method.

The rmtree function is no longer user, rather the test_suite.clean_up.deletion() function is being
used to handle the issue of MS Windows not releasing the file in time.