Get the version at make time, not qmake time

Let's see how many tries it will take me to get this one right...
The name of the .dmg needs to be determined when running make, not qmake.
Otherwise we'd have to force the user to run qmake every time version.h
changes. This looks better.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Make sure version.h is updated whenever the git version changes

The easiest way to do this seems to make it depend on the correct git
reference. qmake will do the right thing (and create a fixed version.h based on
the VERSION variable) if the user is working from a tar ball.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Add test dive with tank pressure sensor information

This is a real data from a Uemis Zurich divecomputer.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>