backup Options.Cfg

en-US: "Cannon" to "Canon"
u_wall02: touch up the pumper graphics
UFOextender_Gun_Melee: pistolWhip rules
u_ext02: touch up some LofTs

ExplosionBState: straighten up melee sounds
Pathfinding: refactor some code
	- take out 1-tile dash (conflicts w/ 2-tile corner strafes)
ProjectileFlyBState: refactor some code & straighten out melee sounds
RuleItem: change getMeleeAttackSound() to getMeleeSound()
BattleItem: description change.