some changes to the extraction runners
added possibility that corner will explore off-diagonal points; also fixed some problems with normalization of vectors in corner search; except for those errors, the last commit would be a good place to revert if things start going sideways
forgot to initialize norm to zero
change how we get the mid_pt direction
minor change
re-ordered structuring of r_perp so that it actually does adjust the extremity in the correct direction
only do the basis direction steps
allow step to vary in the extremized dimension
reduce size of step by an order of magnitude
consider corners after considering random steps
corner focus starts on centroid rather than on chisq_min
okay.... start from the chisq_min; however, now corner search randomly proposes non-extremized dimensions