--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test-data/combined.o.bed.coverage	Sat Apr 28 15:07:26 2018 -0400
@@ -0,0 +1,125 @@
+chr15	95484290	95485433	Dbx2	29	170	406	83	70	23	6	6	104	63	125	63	55	78	34	44
+chr15	95484290	95484390	Dbx2_window1	1	3	43	3	14	4	3	1	9	2	1	5	3	3	1	2
+chr15	95484340	95484440	Dbx2_window2	1	4	39	5	11	5	3	4	7	6	1	6	3	2	2	2
+chr15	95484390	95484490	Dbx2_window3	0	4	35	8	8	7	4	3	7	5	2	5	3	7	4	1
+chr15	95484440	95484540	Dbx2_window4	0	9	35	7	10	8	1	1	6	7	4	4	2	7	3	1
+chr15	95484490	95484590	Dbx2_window5	1	10	41	6	6	6	1	0	9	5	6	4	3	9	5	3
+chr15	95484540	95484640	Dbx2_window6	1	14	31	4	6	9	1	0	15	7	12	7	5	5	4	5
+chr15	95484590	95484690	Dbx2_window7	1	18	26	7	4	3	0	0	14	10	12	8	7	6	4	4
+chr15	95484640	95484740	Dbx2_window8	0	24	30	8	11	3	0	0	16	11	13	8	8	8	1	6
+chr15	95484690	95484790	Dbx2_window9	1	29	50	11	16	4	0	0	18	11	10	9	6	7	4	6
+chr15	95484740	95484840	Dbx2_window10	2	36	50	10	15	3	0	0	19	11	16	13	6	8	10	7
+chr15	95484790	95484890	Dbx2_window11	2	35	59	11	12	3	0	0	17	8	18	11	5	15	10	5
+chr15	95484840	95484940	Dbx2_window12	7	43	59	18	6	0	0	0	16	8	19	14	7	24	12	12
+chr15	95484890	95484990	Dbx2_window13	13	43	61	21	8	0	1	2	18	10	21	11	10	30	14	14
+chr15	95484940	95485040	Dbx2_window14	17	48	82	21	7	0	1	2	18	13	24	12	14	26	11	16
+chr15	95484990	95485090	Dbx2_window15	15	39	80	20	6	0	1	2	24	11	32	15	15	29	6	13
+chr15	95485040	95485140	Dbx2_window16	5	35	76	18	9	1	1	0	25	13	26	9	18	23	4	10
+chr15	95485090	95485190	Dbx2_window17	3	31	95	24	7	1	1	0	29	16	27	15	18	19	3	10
+chr15	95485140	95485240	Dbx2_window18	3	31	114	17	14	1	1	0	29	17	35	15	14	7	3	9
+chr15	95485190	95485290	Dbx2_window19	6	35	117	20	14	1	0	0	22	15	40	14	11	6	2	8
+chr15	95485240	95485340	Dbx2_window20	5	31	91	13	11	2	0	0	11	8	39	13	11	3	3	4
+chr15	95485290	95485390	Dbx2_window21	4	19	50	11	6	2	0	0	4	7	25	8	8	3	2	3
+chr15	95485340	95485440	Dbx2_window22	1	12	21	5	2	3	0	0	0	3	15	7	6	0	2	1
+chr10	20444676	20445116	Pde7b	72	177	214	15	34	16	16	20	67	43	82	40	36	18	19	14
+chr10	20444676	20444776	Pde7b_window1	21	34	31	3	7	6	4	5	12	9	22	12	12	1	5	1
+chr10	20444726	20444826	Pde7b_window2	27	90	100	5	14	10	6	5	24	16	43	18	15	9	11	3
+chr10	20444776	20444876	Pde7b_window3	57	145	151	9	20	12	7	12	42	24	51	25	21	13	14	11
+chr10	20444826	20444926	Pde7b_window4	50	139	165	7	23	10	9	13	50	29	55	28	20	13	12	12
+chr10	20444876	20444976	Pde7b_window5	33	72	111	10	19	7	9	9	39	22	39	19	21	8	6	11
+chr10	20444926	20445026	Pde7b_window6	15	38	59	5	13	3	7	5	26	18	26	15	16	6	7	2
+chr10	20444976	20445076	Pde7b_window7	7	11	27	6	6	1	5	0	11	8	10	3	8	4	2	1
+chr10	20445026	20445126	Pde7b_window8	4	7	19	2	4	1	4	2	6	7	9	2	4	3	3	0
+chr18	58715130	58715849	Slc27a6	36	166	227	60	58	56	51	72	170	133	201	133	113	162	53	100
+chr18	58715130	58715230	Slc27a6_window1	1	16	27	2	7	4	8	10	15	10	24	13	15	18	8	6
+chr18	58715180	58715280	Slc27a6_window2	1	24	47	3	8	7	14	13	35	20	46	22	28	35	14	15
+chr18	58715230	58715330	Slc27a6_window3	7	36	60	5	7	14	16	22	47	29	70	38	40	58	21	27
+chr18	58715280	58715380	Slc27a6_window4	10	50	80	8	8	21	12	22	56	32	78	52	52	73	25	44
+chr18	58715330	58715430	Slc27a6_window5	11	71	80	18	20	26	12	28	64	41	88	64	60	81	29	49
+chr18	58715380	58715480	Slc27a6_window6	14	75	80	22	24	20	16	31	66	37	74	59	54	63	28	56
+chr18	58715430	58715530	Slc27a6_window7	13	70	87	28	29	17	20	30	69	57	68	52	45	55	21	44
+chr18	58715480	58715580	Slc27a6_window8	16	65	75	28	25	17	18	31	63	53	59	47	30	44	14	40
+chr18	58715530	58715630	Slc27a6_window9	12	46	63	24	22	18	8	15	45	48	43	26	17	35	3	13
+chr18	58715580	58715680	Slc27a6_window10	8	32	46	19	10	15	7	9	32	35	31	25	10	20	0	8
+chr18	58715630	58715730	Slc27a6_window11	6	27	32	14	8	11	8	9	23	29	27	24	9	19	0	7
+chr18	58715680	58715780	Slc27a6_window12	5	15	24	11	5	9	8	8	21	25	21	17	8	11	2	6
+chr18	58715730	58715830	Slc27a6_window13	6	9	19	8	4	6	10	5	13	15	19	12	7	8	2	3
+chr18	58715780	58715880	Slc27a6_window14	4	2	10	5	4	5	4	3	10	9	14	6	4	4	2	0
+chr2	32816762	32817713	Rpl12	58	243	278	57	88	124	92	59	169	112	126	81	57	44	26	38
+chr2	32816762	32816862	Rpl12_window1	0	8	8	2	10	4	1	0	10	5	5	2	0	0	0	0
+chr2	32816812	32816912	Rpl12_window2	3	14	21	5	10	9	7	3	16	10	5	5	3	3	0	5
+chr2	32816862	32816962	Rpl12_window3	10	32	32	9	15	17	12	7	25	17	14	9	6	7	0	7
+chr2	32816912	32817012	Rpl12_window4	11	33	40	13	11	18	13	8	25	16	16	11	6	12	2	6
+chr2	32816962	32817062	Rpl12_window5	12	44	43	17	22	26	16	7	29	18	24	14	10	11	2	5
+chr2	32817012	32817112	Rpl12_window6	15	67	79	23	20	35	19	13	40	25	37	23	19	17	5	9
+chr2	32817062	32817162	Rpl12_window7	23	88	108	25	30	46	38	17	52	36	45	25	29	12	9	10
+chr2	32817112	32817212	Rpl12_window8	33	101	121	30	27	45	42	26	57	47	53	30	33	12	12	13
+chr2	32817162	32817262	Rpl12_window9	27	96	93	27	27	37	40	21	55	38	49	26	25	10	12	11
+chr2	32817212	32817312	Rpl12_window10	17	71	52	16	25	30	29	18	48	31	40	23	11	8	9	10
+chr2	32817262	32817362	Rpl12_window11	5	54	39	11	17	23	19	7	37	24	30	20	8	7	7	7
+chr2	32817312	32817412	Rpl12_window12	4	40	43	4	14	28	16	13	37	25	27	18	5	11	8	9
+chr2	32817362	32817462	Rpl12_window13	7	40	48	3	14	26	14	14	36	23	25	17	6	9	7	12
+chr2	32817412	32817512	Rpl12_window14	6	37	43	4	13	25	12	14	31	21	19	14	6	9	4	10
+chr2	32817462	32817562	Rpl12_window15	6	27	30	3	12	15	9	9	21	12	12	12	7	9	2	7
+chr2	32817512	32817612	Rpl12_window16	2	15	22	1	6	6	5	4	13	6	5	6	4	5	2	1
+chr2	32817562	32817662	Rpl12_window17	1	11	25	1	7	7	4	4	12	8	4	7	5	3	2	1
+chr2	32817612	32817712	Rpl12_window18	2	14	29	1	5	5	6	4	10	5	4	7	4	3	1	0
+chr2	32817662	32817762	Rpl12_window19	2	15	29	3	6	10	9	4	9	7	8	4	3	3	1	3
+chr9	106331200	106332399	Rpl29	94	304	471	97	119	193	184	89	260	178	178	117	98	101	28	50
+chr9	106331200	106331300	Rpl29_window1	4	11	12	8	5	13	13	3	20	13	11	6	5	5	0	0
+chr9	106331250	106331350	Rpl29_window2	5	15	21	10	10	20	15	8	31	15	15	5	7	5	0	0
+chr9	106331300	106331400	Rpl29_window3	6	17	27	10	9	20	23	8	32	16	18	6	5	9	0	0
+chr9	106331350	106331450	Rpl29_window4	8	18	33	7	14	19	17	5	35	12	19	9	7	10	0	1
+chr9	106331400	106331500	Rpl29_window5	12	21	35	6	12	16	24	11	37	24	16	12	6	8	0	3
+chr9	106331450	106331550	Rpl29_window6	15	22	32	7	12	19	23	11	38	23	19	14	7	7	0	6
+chr9	106331500	106331600	Rpl29_window7	14	34	70	10	14	28	38	15	45	30	25	18	12	4	4	6
+chr9	106331550	106331650	Rpl29_window8	27	73	131	19	21	40	44	22	53	35	36	26	22	15	6	7
+chr9	106331600	106331700	Rpl29_window9	32	96	173	30	30	56	50	25	56	38	41	35	30	37	11	10
+chr9	106331650	106331750	Rpl29_window10	42	120	197	33	36	66	49	32	61	51	40	42	33	48	16	25
+chr9	106331700	106331800	Rpl29_window11	36	130	200	36	48	66	50	40	69	55	46	48	35	53	19	32
+chr9	106331750	106331850	Rpl29_window12	32	119	172	30	38	59	47	31	70	48	52	47	29	36	13	28
+chr9	106331800	106331900	Rpl29_window13	14	74	141	19	34	44	37	25	62	48	44	33	25	28	9	18
+chr9	106331850	106331950	Rpl29_window14	8	62	84	17	28	31	28	11	42	36	31	22	18	19	2	8
+chr9	106331900	106332000	Rpl29_window15	9	41	61	13	22	22	25	9	36	34	27	14	14	15	3	8
+chr9	106331950	106332050	Rpl29_window16	8	29	42	9	16	16	18	11	31	25	29	8	13	9	2	7
+chr9	106332000	106332100	Rpl29_window17	6	24	40	9	15	17	14	4	24	20	29	6	10	9	1	3
+chr9	106332050	106332150	Rpl29_window18	9	23	33	9	10	22	14	3	16	13	33	7	8	8	1	0
+chr9	106332100	106332200	Rpl29_window19	5	19	29	10	7	26	15	2	21	15	24	8	8	6	0	1
+chr9	106332150	106332250	Rpl29_window20	1	18	24	9	6	20	16	1	25	13	16	12	6	2	0	1
+chr9	106332200	106332300	Rpl29_window21	0	9	18	9	9	14	17	1	24	12	13	9	6	1	0	1
+chr9	106332250	106332350	Rpl29_window22	3	12	15	6	7	8	17	3	25	9	8	10	7	2	0	1
+chr9	106332300	106332400	Rpl29_window23	3	8	10	5	6	6	12	6	16	4	6	3	6	1	2	0
+chr2	153116826	153117777	Kif3b	74	211	266	79	108	127	109	47	159	86	100	77	65	57	22	38
+chr2	153116826	153116926	Kif3b_window1	3	13	22	8	10	15	12	4	13	9	7	6	5	2	2	4
+chr2	153116876	153116976	Kif3b_window2	3	10	27	13	9	17	13	7	17	11	10	5	7	3	0	6
+chr2	153116926	153117026	Kif3b_window3	14	19	39	17	17	24	15	9	26	10	13	11	7	7	0	8
+chr2	153116976	153117076	Kif3b_window4	23	49	82	27	33	29	33	16	51	15	27	18	14	19	5	8
+chr2	153117026	153117126	Kif3b_window5	24	96	114	31	40	43	42	20	69	28	39	30	24	28	9	9
+chr2	153117076	153117176	Kif3b_window6	38	113	126	27	49	49	51	23	62	35	44	31	25	34	11	16
+chr2	153117126	153117226	Kif3b_window7	41	98	105	21	34	41	45	19	53	34	36	29	27	32	8	18
+chr2	153117176	153117276	Kif3b_window8	36	54	63	18	25	25	30	13	29	27	21	20	17	17	7	12
+chr2	153117226	153117326	Kif3b_window9	10	30	36	12	11	15	15	9	19	19	13	13	11	7	3	9
+chr2	153117276	153117376	Kif3b_window10	5	18	20	12	11	16	10	6	18	13	7	10	8	5	4	3
+chr2	153117326	153117426	Kif3b_window11	4	23	16	12	12	19	12	4	16	14	8	8	9	5	4	3
+chr2	153117376	153117476	Kif3b_window12	4	34	24	11	15	18	16	3	20	8	7	9	10	5	2	5
+chr2	153117426	153117526	Kif3b_window13	3	30	31	11	18	17	19	1	21	10	16	7	9	4	3	5
+chr2	153117476	153117576	Kif3b_window14	6	26	40	8	16	15	12	4	25	11	20	10	10	3	3	5
+chr2	153117526	153117626	Kif3b_window15	7	17	33	7	15	12	8	6	18	7	21	8	10	3	2	3
+chr2	153117576	153117676	Kif3b_window16	5	13	29	5	14	13	7	5	21	6	16	12	6	2	1	3
+chr2	153117626	153117726	Kif3b_window17	4	13	16	4	14	10	6	3	16	3	9	12	5	3	0	1
+chr2	153117676	153117776	Kif3b_window18	2	11	20	4	9	8	8	1	17	6	8	10	6	2	0	1
+chr2	153117726	153117826	Kif3b_window19	1	10	11	3	6	6	4	1	11	6	6	8	5	2	0	0
+chr1	133049497	133050192	Eif2d	146	406	445	66	96	86	114	49	125	59	72	41	65	25	14	14
+chr1	133049497	133049597	Eif2d_window1	1	15	7	5	3	8	3	0	11	1	2	3	3	3	0	1
+chr1	133049547	133049647	Eif2d_window2	3	31	25	11	12	12	11	3	16	5	4	6	6	3	0	3
+chr1	133049597	133049697	Eif2d_window3	37	112	115	22	36	25	27	16	33	16	20	12	17	2	2	5
+chr1	133049647	133049747	Eif2d_window4	74	209	224	36	54	37	54	21	52	29	35	17	31	7	6	8
+chr1	133049697	133049797	Eif2d_window5	111	295	309	41	65	43	69	29	71	37	51	23	34	16	8	10
+chr1	133049747	133049847	Eif2d_window6	115	285	297	38	51	43	64	26	72	35	42	21	35	17	8	7
+chr1	133049797	133049897	Eif2d_window7	62	197	217	25	33	34	50	22	51	24	29	16	26	11	5	1
+chr1	133049847	133049947	Eif2d_window8	28	105	113	17	19	25	30	20	34	13	21	11	19	4	2	0
+chr1	133049897	133049997	Eif2d_window9	12	35	63	10	12	13	22	10	25	9	12	8	17	2	6	0
+chr1	133049947	133050047	Eif2d_window10	10	23	39	8	12	10	19	6	15	5	9	5	10	2	5	0
+chr1	133049997	133050097	Eif2d_window11	4	16	37	7	11	7	11	6	13	1	6	5	6	1	3	0
+chr1	133050047	133050147	Eif2d_window12	1	10	21	3	7	5	9	2	10	3	4	3	6	2	0	2
+chr1	133050097	133050197	Eif2d_window13	1	6	13	1	6	6	7	3	7	7	2	2	5	2	0	2