r762: cleanup for the new release; unfinished

It will take to make the documentation ready.
updated maual page
r764: changed -c in "-x pacbio" to 500
r765: fixed a declaration error

Reported by Andreas Tile from Debian
r766: removed useless code
updated README
changed the heading format
fixed wrong FAQ links
r770: fixed a compiling warning
Updated release notes
r778: reduced the number of alloc() calls a bit
r779: fixed a memory leak in SE
Release bwa-0.7.9-r782
Release bwa-0.7.9-r783
Wrong release number: 0.7.8 => 0.7.9
0.7.9a-r786: fixed a segfault in a rare case

More likely to happen given a circular genome