relax SVN archive

Updated the docstrings of the chi-squared value, gradient, and Hessian functions.

They are now in epydoc format.

Converted the maths_fns.chi2 module from Numeric to numpy.

The vector of back-calculated reduced alignment tensors is now created.

The reduced back calculated tensors are now calculated.

The dimensions of the structures red_bc and red_bc_vector have been fixed.

Decreased the grid size from 3 to 2 in the 5_state_xz.py script of the system test.

This still takes far to long for a system test! The grid search will have to eventually go.

The red_bc_vector structure is now passed into the chi2 equation.

Added the red_bc and red_bc_vector structures to N_state_opt.

These store the back-calculated tensors in matrix and vector forms.

Calculated the transposes of the rotation matricies.

Updated the rotation matrix calculation to be independent of the value of N.

Changed the full_tensors, R, and RT structures in N_state_opt to be pure numpy objects.