Removed solver-optimization scripts
Added a script the plot three function instances
Modified perturbed quad/rast functions
Added five test functions for minimax problems
Draw contour of a minimax test function
Fixed a maxfunevals bug
Fixed a contour data bug
Added legend and x/y labels to plot
Modified prtb_quad

This function is modified to illustrate a potential problem of
coevolutionary algorithms which can not find a stationary solution of
this function.
Better runner for min-max experiments