Add --version to command line options

Displays Subsurface and libdivecomputer versions.

Suggested-by: Jef Driesen <jefdriesen@telenet.be>
Signed-off-by: Henrik Brautaset Aronsen <subsurface@henrik.synth.no>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Add --help command line option

Added a simple usage text on the command line.  Also added a
--verbose alias for completeness.

Signed-off-by: Henrik Brautaset Aronsen <subsurface@henrik.synth.no>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Fix a mistake naming for the da_dk alias localisation

The country code is da, not dk.

Suggested-by: Sylvestre Ledru <sylvestre@debian.org>
Signed-off-by: Henrik Brautaset Aronsen <subsurface@henrik.synth.no>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Support for aquadivelog UDDF import

This implements limited support for importing dives from a Palm divelog
software called aquadivelog. Basic depth graph is imported but most of
the metadata is currently discarded.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Include more information on Aquadivelog import

This adds information on cylinders and gas changes and some other basic
stuff like buddy, dive site, weights.

Visibility should probably be ignored as UDDF specifies it as meters and
we have a scale of 0-5. But currently it is copied as is to the
visibility field in Subsurface.

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Visibility scaling for UDDF import

Visibility is defined in meters in UDDF and we use scale up to 5 stars.
Thus the meters are scaled to our star rating using one-size-fits all
method.

< 1m => 1 star
<= 3m => 2 star
<= 5m => 3 star
<= 10m => 4 star
> 10m => 5 star

Signed-off-by: Miika Turkia <miika.turkia@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Translation updates

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