relax SVN archive

Added another set of valid optimisation values to Mf.test_opt_constr_newton_gmw_mt_S2_0_970_te_2048_Rex_0_149.

This is a second set different numbers for 32-bit Linux! The result is the same though.

Made the N_state_model.test_pcs_fit_zero_pos system test less stringent so it passes on 32-bit Linux.

Removed the status singleton from the main relax class namespace.

Shifted the global relax debug flag from __main__.debug to the relax status singleton.

This allows the flag to be defined even when imported from outside of relax. Also the pedantic flag
is now being directly passed into the relax warning system and hence has been shifted out of
__main__.

Big code clean up in the Unit_test_runner class.

Deleted the ExtendedException class as it was doing nothing.

Clean up of the unit test runner code for command line usage.

The "testing units..." text is only printed if verbosity is set.

Fix for load_test_case() for a bug introduced in r12095.

The import errro test case was not handled correctly.

Big clean up of the load_test_case() unit test function.