Alpha 34 hotfix 7 released

Fixed crash caused by team members gaining the 'steed' attribute and then traveling.
Made Death invulnerable to goblin kaboomer attack.
Added a new bone dragon sprite.
Returning from polymorphed form doesn't reset dwarves' upgraded sprites.
Creature's first name and combat experience carries over when polymorphing.
Fixed skeleton wolf's body material from undead flesh to bone.