Reverse the order of entries in changelog
Update copyright year
Implement BFS search
Implement calculating all distances from a given actor, via BFS
Improve the display of targeting information
Improve targeting mode transitions
Reset cursor to new leader's target
Fix target canceling and improve target mode transitions further
Add targets relative to actor's position
Almost show pathfinding distance to leader's target

It doesn't yet work, because we need a vector of vectors
to represent a level, not a single vector.
Switch from Vector to Kind.Array for BFS
Fix BFS search
Treat closed doors as open tiles in pathfinding
Show cursor, but not targeting line nor delta on remote levels
Generate BFS data on demand and cache for the session
Invalidate BFS distance data in some cases