This patch will convert a heading bookmark to Subsurface format. Suunto's bookmark uses "Heading: <degrees>°" format and was previously set as the full event name. Now the resulting event will look like: <event name="heading" value="333" time="0:58 min"/> Signed-off-by: Miika Turkia <miika.turkia@gmail.com> Signed-off-by: Dirk Hohndel <dirk@hohndel.org>