TileEngine::reactionShot() stop aLien RF jumping my camera!

BattlescapeGame: refactor checkForCasualties() a bit
	- esp. Soldier Diary data
	- varname changes.
Camera: format.
ExplosionBState: drop explosion center down another pixel.
UnitSprite: format snakes ...
SavedBattleGame: descriptions, format, varname changes
	- refactor getMoraleModifier()

Xcom1Ruleset: increase Chrys bravery from 90 to 100