Simplyfy client command types and clean up
Re-enable slastKey

so that tapping ESC twice clears the screen.
After a disturbance, run one time with each undisturbed actor
Optimize the Enum instance of PointXY
Make PointXY strict
Clean up imports
Make VectorXY strict
Represent Point and Vectors as offsets with 16-bit coordinates
Fix tilekind arrays to match changes in dungeon coordinates
Store dungeon map in a vector, not array

At least savegame loading is now much faster.
Optimize vector uses
Simplify a monadic tree map call
Switch back to indexing tile arrays wih Point instead of PointXY
Get rid of the now unneeded lxsize parameter