Fix model.r to show alternative *lags* between plus and minus strand reads.
Fix model.r to show alternative *lags* between plus and minus strand reads.

daler/MACS,taoliu/MACS,taoliu/MACS,daler/MACS,daler/MACS,vd4mmind/MACS,vd4mmind/MACS,vd4mmind/MACS,taoliu/MACS