0.7.9a-r786: fixed a segfault in a rare case

More likely to happen given a circular genome

0.7.9a-r786: fixed a segfault in a rare case

More likely to happen given a circular genome

r455: release bwa-0.7.8

Released bwa-0.7.7-r441

Release bwa-0.7.6a-r433

Release bwa-0.7.5a

Release bwa-0.7.5-r404

Release bwa-0.7.3a-r367

In 0.7.3, the wrong CIGAR bug was only fixed in one scenario, but not fixed
in another corner case.

Release BWA-0.7.3-r366

Release bwa-0.7.2-r351

For the TLEN sign fix. Sorry for the significant bug in 0.7.0/0.7.1