Support buddies with only a first name, no surname.

The previous patch would not fill the first name field if there was
no second name. This rectifies that.

Signed-Off-By: Martin Long <martin@longhome.co.uk>

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Aggregate multiple weights into UDDF export.

Sum together all of the weights recored on a dive to use in the
<leadquantity> tag in UDDF export.

Signed-off-by: Martin Long <martin@longhome.co.uk>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
More temperature plot position tuning

Depending on the options shown, the latest change appears to have moved
the temperature graph a bit too low. This seems to work better in my
experiments.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
Trivial white space fix

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