Support mod that add gunnery school to other Empire factions.

Decreased 1 missile ap damage;
Increased 1 second base reload time;
Decreased the detonation force for explosion bullet;
Increased 5 accuracy.

Added magic attack, special projectile trail, and initial event lock for Amethyst Ironsides Repeater.
Fixed a bug that the player will get two regular Amethyst Ironsides instead of one for both types.