Add a todo list.
Get rid of recursion in the implementation of minElementPairImpl() and maxElementPairImpl() since it can be done easily by iteration.  When oh when will the JVM get tail recursion ellimination?  The never-ending lament of the functional programmer...
Improve the implementation of minElementPairImpl() and maxElementPairImpl().  Avoid doing test that can never fail.
Use the generics <> syntax to avoid warning about unchecked exceptions.
Revamp of the IntMapModule to its new interface.  Not everything is in place yet.