Major rewrite of Polar Manager, move to Bluewater-specific .plr file format. Expedition/Deckman still supported. Sailonline polar files are now supported. Substantially more editing functions added to Polar Manager. Route manager modified to combine routes and marks into one display tree. Routing algorithm now uses A-Star heuristic to speed search. Program internal structure changed to simplify MAC OS native version support. Program help is now a html file hierarchy in accordance with Mac Help. Bug optimizing in lakes and ponds fixed. Grib display configuration changes can be saved.