rename residual.df to df.residual in results object

[ghost]

This is only a very minor thing but the results object from a mclogit call should return an object where the residual df is called "df.residual". At the moment (0.6.1) it is called "residual.df" which can produce errors if called by another function that uses the normal regression result output object structure.

[melff]

Fixed with release 0.6.3.