Ubuntu packaging: Create the correct libdivecomputer version

Since we strip the .git data from the source tree (to conserve space and not
violate the packaging guidelines - or at least not violate THAT packaging
guideline) we need to create the correct revision before the tar file of sources
is packaged.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Prevent the tank bar from overlaping the temperature graph.

Signed-off-by: Joakim Bygdell <j.bygdell@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>