another patch for residue.m

[Ben Abbott]

John,

Although it might appear a bit brazen ;-) ... I decided to charge  
forth with another patch in order to include poly multiplicity in the  
reciprocal operation of the residue script.

The present operation supports the syntax below.

        [R, P, K, E] = residue (B , A);
        [B, A] = residue (R, P, K);

The attached patch adds the pole's multiplicity as an optional input.

        [R, P, K, E] = residue (B , A);
        [B, A] = residue (R, P, K, [E]);

I've modified the doc string to respect the new optional input, and  
corrected some of my habits with respect to code formating.

I also modified the test script; removed the part that is no longer  
needed now that the mpoles script works correctly (orders poles  
consistently), and added testing for the new optional input.

Ben

patch.txt
Description: Text document

ChangeLog.txt
Description: Text document