Extract rows from a tabix indexed file. E.g.:
>>> from petlx.tabix import fromtabix
>>> from petl import look
>>> t = fromtabix('test.bed.gz', region='Pf3D7_02_v3:100000-200000')
>>> look(t)
+---------------+----------+----------+-----------------------------+
| '#chrom' | 'start' | 'end' | 'region' |
+===============+==========+==========+=============================+
| 'Pf3D7_02_v3' | '23100' | '105800' | 'SubtelomericHypervariable' |
+---------------+----------+----------+-----------------------------+
| 'Pf3D7_02_v3' | '105800' | '447300' | 'Core' |
+---------------+----------+----------+-----------------------------+
New in version 0.4.