relax SVN archive

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.

Fix for the Relax_disp.test_m61_exp_data_to_m61 system test on 32-bit Mac OS X.

The optimisation precision was not great enough to find the minimum, so the grid search increments
have been increased from 3 to 4.

Fix for the N_state_model.test_populations system test on Mac OS X.

The optimisation on Macs is not as precise as on Linux, so the test was loosened.

Increased the speed of the N_state_model.test_populations system test again.

The maximum number of iterations for the minimise user function is now set to 500.

Limited the optimisation time in the N_state_model.test_populations system test.

This test can take a huge amount of time on Mac OS X and MS Windows (~6 seconds on Linux, ~360
seconds on Mac OS X, and ~120 seconds on MS Windows, all on similar hardware). Now the minimise
user function max_iter argument is set to 2000 to speed the test up.

API documentation fix for test_suite.system_tests.relax_disp.Relax_disp.setup_korzhnev_2005_data().