Bring back the detection of divecomputer in /usr/local
Implement updating version.h after every commit

Signed-off-by: Thiago Macieira <thiago@macieira.org>
Remove the old buildsystem

Signed-off-by: Thiago Macieira <thiago@macieira.org>
WIP installation rules

Signed-off-by: Thiago Macieira <thiago@macieira.org>