Crash fix and targeting terrain fix

This is to address a targeting issue while units are on terrain such as bushes or trees. The terrain was taking the damage first and not the unit. Also fixes a rare crash that only sometimes occurs when joining an existing battle.

Bug fix:

• Targeting units standing on terrain will not hit the terrain instead. I.e. A bush should shield you from damage

Stability:

• Fix crash that sometimes occurs when joining an existing battle

Usability:

• Tweak to wording in the bio

UI & Graphics:

• Cost of a unit now appears in the unit character sheet

• Removed some old images