This class that extends the virtual class "groupStats" by adding
a slot representing the significant members.
Details
This class is used for test statistic based on counts, like Fisher's
exact test
Objects from the Class
Objects can be created by calls of the form
new("classicCount",
testStatistic = "function",
name = "character",
allMembers = "character",
groupMembers = "character",
sigMembers = "character").