Reject use of algorithm package.

[amunn]

The algorithm package sets up the list of algorithms using the float package which is incompatible with the memoir new float/list capabilities. It's preferable to use the class methods to set up the list of algorithms. So algorithm must be prevented from loading, but emulated (since it also sets the \newcommand{\ALG@floatstyle}{...} with the options ruled, plain or boxed. Maybe best to implement a class option for algorithm to pass the relevant style option.