fixed references to mpp to expect a 3x1 array and behave accordingly, modified function names to reflect new function: ie, avg_radius_corrected is now simply avg_radius, avg_radius is now avg_radius_dep because it does not take the correct measures for an mpp conversion, and micron_rads is now micron_rads_directionless because it provides a directionless approximation of the true radius in microns