Content Update - Demo - V4

Demo V4 is now live on the public branch.

Added starvation system. Starvation damage now reduces each unit's health by 10% of their Max HP per turn and disables healing.
Added tooltips. Tooltips appear when hovering over resource icons in the resource bar, buttons in the building and unit panels and the building icons in the build menu.
Added sparks that fly off enemies when they are hit with the color changing depending on their armor. Archers and workers wear leather armor and produce white sparks while Soldiers wear iron armor and produce orange sparks.
Added information to the Farm and Castle's building panels to show how much food they produce per turn.
Added new death animations: when a unit dies, instead of simply disappearing, the unit sinks into the ground.

Changed Food Icon.
Removed Food from unit production costs.
Reduced retaliation damage for melee units. Now melee units deal 75% damage when they retaliate.
Reduced volume of construction sound effects.
Changed the path style: instead of outlining each tile to reach the destination tile, a line draws through the middle of each tile to the destination tile.
Removed movement animations for all units so that they look more like chess pieces sliding on the board.

Fixed barracks giving a production error when one of its output tiles was blocked instead of using the other one.
Fixed plants and grass acting as "obstacles" that if a unit stood on, would cause them to gain the see through white material.
Fixed military units being able to attack enemy units that are already destroyed.
Fixed wood not updating at the start of the turn.
Fixed clicking "Harvest" and then clicking "Build" not cancelling the "Harvest" order.
Fixed custom cursor not being saved when clicking "Play" and travelling to the demo map which resulted in the default Windows cursor instead replacing the custom cursor.