fast.chisq.test         Fast Zero-Tolerant Pearson's Chi-squared Test
                        of Association
fast.gtest              Fast Zero-Tolerant G-Test of Association
fast.upsilon.test       Fast Upsilon Test of Association between Two
                        Categorical Variables
modified.chisq.test     Zero-Tolerant Pearson's Chi-squared Test for
                        Contingency Tables
modified.gtest          Zero-Tolerant G-Test for Contingency Tables
upsilon.test            Upsilon Test of Association for Count Data
