direct ROH

[MatthewMah]

Consider storing ROH directly instead of series of sums.

Start	End	StartM	EndM	length	lengthM	iid	ch	StartPosGRCh37	EndPosGRCh37
5132	13807	0.312264	0.57488501	8675	0.26262101	example	18	10330738	38202500
8294	15744	0.385997	0.57195503	7450	0.18595803	example	20	16217910	39041871

Need StartM, EndM, ch, maybe start and end positions.