Small update that does this:

All summons now have 360 vision and no penalty in day time (they previously saw better at night). Ranged units also have better vision than non-ranged versions.

I also removed the "Guard leader" behaviour as it is *possible* that was making them passive unless the player is attacked.

Updated appearances of Knights.

Overhauled progression.

Added new bone types (used for summoning stronger beings. 2 Humanoid Bones makes 1 T2 Human Bones and so on).

Added Heavy Knight as a new summon.

Updated the healing and create bones abilities.

Fixed the ui display in the skill book.

Added 4 new summons:
Spear and Archer skeletons. Basic lads unlocked early.

Town and Crossbow skeleton guards.

Town guard are slightly worse Skeleton guards but they come in threes.

Also updated the Skeleton knight sprite.