Polishing, bugs fixed, upcoming beta version

New features and bug fixes based on feedback I got from a couple of players (thanks!).

1. Mouse press (when no dialog visible) does not cause a crash in-game
2. Added Objectives window with mission status - goals remaining
3. Goals are better marked - beside a goal marker, fishing region now shows fishes moving and anchorage region now has anchors slowly appearing and disappearing
4. If player is too far from the next goal, a helpful arrow points in its direction
5. Boat graphics changed to white