relax SVN archive

Redesigned the relaxation curve fitting grid search for the new design of the minfx grid search.

Added a series of checks to the test_curve_fitting() system test.

Fix for the test_opt_rigid_rand_rot() system test.

The changes to the frame order grid search broke this test.

Bug fix for the reading of Xplor NOE data when a line starts with '#'.

Added a false, deliberately broken Xplor line to test the parsing of Xplor NOE files.

Fix for the __unpack_opt_results() for the new direct calling of the grid search.

The returned results are different.

Fixed the call to the grid search.

Implemented the acos grid search for angular parameters of the frame order theories.

Complete redesign of the grid_search() method.

The grid ops structure is no longer created, rather the grid is directly created to be passed to the
grid search algorithm. The __grid_row() method has been added to create the row of the grid
corresponding to a certain parameter.

Fix for the missing PDB file error.

The extension '.pdb' was being added to the end so if the missing file '1F3Y.pdb' was specified,
the RelaxError would say that '1F3Y.pdb.pdb' was missing.