Remove rounding of the value for minutes when editing dive date/time

For the "Edit dive date/time" dialog, (time->tm_min / 5)*5)
with integers can lose precision due to truncation, showing for example
a value of 55, where 59 is the actual previsouly stored value.

Reported-by: Cristian Ionescu-Idbohrn <cristian.ionescu-idbohrn@axis.com>
Signed-off-by: Lubomir I. Ivanov <neolit123@gmail.com>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
XSLT for UDDF import

This XSLT imports the UDDF logs that I have received samples of. This
includes kenzooid and Heinrichs Weikamp's DR5.

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