Better pathfinding and reworked villager AI

Added features:

• Minimap move commands are now available
• Actors now walk in the general direction of a command even though they might not be able to reach their goal
• When gathering or building actors only move if the can in fact reach their goal
• Reworked villager AI somewhat
• Dropoff points now allocate a drop of tile (preferably the closest) to an actor in need which should eliviate congestion
• if a resource becomes unreachable for a while vilager will instead start to gather from the closest similair resource

Bugs fixed

• Missing animation when a building is finished
• Villagers stop and become immovable and stop being able to do anything when pathfinding does not find a solution
• Wrong alignment and orientation when playing building animation
• Sped up things a bit by converting more vvarables passed by functions to references