relax SVN archive

relax version 3.1.0.

This is a major feature release which adds full support for the analysis of relaxation dispersion
data.

Bug fix for the previous commit (r21686).

Improvements in the test_suite.clean_up.deletion() function.

It is now more fail safe on Python 3 by completely avoiding the WindowsError checking.

The relax system test base tearDown() method should now be fail proof.

Most code is now warped in a 'try: except: pass' block to catch all failures.

Fix for the specific_analyses.relax_disp.optimisation.back_calc_r2eff() function.

The R2eff error data structure when the cpmg_frqs or spin_lock_nu1 argument is supplied was all
zeros, whereas it should all be ones. This was causing many divide by zero numpy warnings to appear
on certain operating systems (Mac OS X).

Avoided some wxPython 2.9.4.1 in the Relax_disp GUI tests.

wxPython is quite buggy, so certain checks and tests cannot be performed.

Removed a debugging printout preventing relax from running on Python 3.

Loosened all checks of the N_state_model.test_populations system test.

This is needed for the woeful optimisation capabilities of Mac OS X (and partly MS Windows as well).

More loosening of the Relax_disp.test_korzhnev_2005_*_data system tests to pass on Mac OS X.

These problems were identified on a different test machine.

Loosened all of the Relax_disp.test_korzhnev_2005_*_data system tests to pass on Mac OS X.

This should hopefully fix the tests for MS Windows as well.