correct simple mission typos
Merge branch 'master' into feature/ian/mission_updates
use faint, not feint
Merge branch 'master' into feature/ian/mission_updates
Merge branch 'master' into feature/ian/mission_updates
Merge branch 'master' into feature/ian/mission_updates
modify 1a so that the submarine can approach from another angle to the JetSki
Merge branch 'master' into feature/ian/mission_updates
Merge branch 'master' into feature/ian/mission_updates
demote the port exit missiong (fishing boats), Ed found it just a chore.
new mission guidance
new method to calculate distance from a line
introduce new behaviour to monitor passing across a line
minor correction to mission text
finish descriptions
allow specification of bonus achievement.  Update schema to reflect this
update from build
Merge pull request #128 from IanMayo/feature/ian/mission_updates

First missions updated
Add L.Graticule lib
Configure L.Graticule lib