Improve OCPNRegion performance.
Improve S57 Attribute management performance.
Refactor to improve S52 LUP/Lookup performance.
Improve S57 overlay cell logic performance
Improve S52 PLIB Lookup matching performance.
Implement configurable Route Arrival Circle Radius.
Improve Route waypoint arrival criterion logic.
Correct depth unit for BSB charts with UN=Meter (FS#1061)
Merge branch 'master' of https://github.com/OpenCPN/OpenCPN
Correct for potential crash on wheel zoom before app is fully initialized.
3.3.827
Correct decoding of Binary TCD file time offsets.
Correct Lookup algorithm for Features with no attributes.
Correct occasional crash on dragging last active waypoint very close to ownship
Merge branch 'master' of https://github.com/OpenCPN/OpenCPN