relax SVN archive

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().

Shifted the dispersion chapter of the user manual to its correct position.

Somehow during the relax_disp branch merger, this chapter was shifted into the "Advanced Topics"
partition of the manual.

Fix for the GUI tests for a wxPython 2.9 ListCtrl.HitTest() bug.

This only affects the relax test suite. The suite should now pass on all systems.

Fix for two system tests to prevent relax save files from being dumped in the installation directory.

This would have been fatal for the tests suite on systems with relax installed as root.