Splitting out the shape of the male dovetail in locking_dovetail

By splitting out the shape of the male dovetail used to calculate the female dovetail in locking_dovetail.scad we are able to use the parametric dictornary-driven dovetail for non-locking dovetails.

I would like to use this in the dissection microscope. (Which submodules this repo)

Long term it might be good to use it for the illumination cube that still uses the old static dovetail library and then retire that library?