removed some comments
remove excessive outputs
return the clustered gts

OK, this looks like a big bug basically I was clustering adjacent
segments with the SAME genotype, but, then still returning the discrete
segments! PHEW, fixed now
update r-cutoff function to max out at 0.9
add option to output ALL genotypes
remove pdb debug trace
remove debugger statements
dynamic edge merging
merge based on function of the minumum copy
refactored output filter data add Lscore
refactor to use info_io object to output info

info fields are now better managed
rm whitespace