Badly aligned sequences often result in long branches in the
tree. Being able to identify those branches quickly helps to
find those sequences.
The programs allows to mark all species having an extra
long branch compared to it's nearest neighbour.
NOTES
Play around and try different numbers.
BUGS
The program does not show all extra long branches because
then the output won't be user readable. So after fixing
the alignment of sequences and recalculating the branch
lengths, there might be new sequences with extra long
branches.