relax SVN archive

The specific_analyses.frame_order.optimisation.target_fn_data_setup() and
specific_analyses.frame_order.parameters.assemble_param_vector() function both now accept the
unset_fail argument. This is set in both the calculate() and minimise() API methods. When set, a
RelaxError will be raised in the assemble_param_vector() function when a parameter has not been set
yet. This together with previous changes will prevent the frame order analysis from using 0.0 as a
starting value for unset parameters.