Compares to a LociMap-class objects to determine if
the first one is a superset of the second. If it is, the function returns NULL.
If it is not, the function return a LociMap-class object that is
a superset of both a LociMap-class objects.
findLociMapSuperset(lociMap1, lociMap2)NULL if locMap1 is a superset, or a LociMap-class if it
is not
a LociMap-class that is tested to determine if
it is a superset
a second LociMap-class that is tested