user can specify the number of soft-clips at breakpoint
user can specify the number of soft-clips at breakpoint

zeeev/wham,jewmanchue/wham,Yandell-Lab/wham,zeeev/wham,jewmanchue/wham,zeeev/wham,chapmanb/wham,chapmanb/wham,chapmanb/wham,chapmanb/wham,Yandell-Lab/wham,jewmanchue/wham,Yandell-Lab/wham,zeeev/wham,jewmanchue/wham,Yandell-Lab/wham