Sort the rows of a quartet table so they are in MSCquartet's standard lex order.
This is the order produced by the quartetTable function. The only exceptions
to this order produced in the package are when quartetTable is called with the
random argument non-zero, or when the HolmBonferoni function is called.
However, for tables made outside this package, it can be useful.
sortQuartetTableRows(qT)sorted table
a quartet Table to be sorted
quartetTable, HolmBonferroni