Bug-fix in converger_1/server.h: save_convergence_state was saving reset-to-max e_min value (i.e. after it was reset to the max of float_type in anticipation of further bootstrapping).

Work on minimum improvement ratio... currently relaxing the pre-conditions to allow for ratio of one, later will have more esoteric mechanisms in need be (e.g. some 'curve' interpolation, ratio vs offset, and so on).