Demo update #20

[p]Update[/p]

[p]Object highlighting on mouse hover[/p]
[p]Updated progression / technology tree[/p]
[p]Fox animation added[/p]
[p]New huntable animal: sheep[/p]
[p]New items: wool, sheep meat, sheep horns[/p]
[p]SFX update[/p]
[p]New crops: potatoes and herbs[/p]
[p]Fire smoke animation[/p]
[p]New food item: roasted sheep meat[/p]