Update 2018-08-05: High Explosives and bug fixes

• Reworked the behavior of High Explosive (HE) shells: now they will create a blast on impact and can make proximity kills on unarmored targets
• Added more control over module damage so durable modules (such as turret rings) can't be taken out by small-caliber weapons or fragmentation
• Increased size of visible blast for missile detonations
• Made minor changes to scenarios
• Fixed armor skipping bug that could affect targets moving toward incoming rounds
• Fixed bug that was causing target lead to be calculated incorrectly in fire control systems
• Fixed M1A2 SEP turret ammo rack armor