Updated Controls and Performance

This update contains a lot of polishing. The turn-to-turn core mechanics are finally on a decent level and the game controls start to have a certain flow to them. I hope some of you guys are willing to provide me some feedback!

• polished animations
• improved movement and ability prediction
• improved AI / gameplay / map generation performance massively
• added marker to show currently selected ability
• units with AP stay selected
• next unit is selected when current unit ends turn with guard / end turn
• added smooth camera transitions between units