from Andrew Hale (trumanblending), with some edits to use these in mathutils.Vector added. Added Functions: - dot_vn_vn - Dot product of two arrays - normalize_vn_vn - Normalize an array and store the result in a second array - normalize_vn - Normalize an array inplace Renamed Functions: Some functions have been renamed to make them consistent with the naming conventions used by fixed length array functions. - fill_vni to fill_vn_i - fill_vn to fill_vn_fl