Updated the grid_search_setup() to the new design.
Replaced a Numeric python dependence with the numpy equivalent.
Updated the assemble_scaling_matrix() method to the new design.
Docstring fix in the assemble_param_vector() method.
Updated the assemble_param_vector() method to the new relax design.
Updated the minimise() method to the new relax design.
Updated the grid_search() method to the new relax design.
Updates to the overfit_deselect() method.
Updated the overfit_deselect() method to the new design.
Fixes for the model_setup() method.