Changed the name of the Carbine to give a hint of his incendiary abilities.
Nerfed the incendiary bullets (The Mech Carbine ammo) to only
5 Brute but retain his incendiary effect.
Changed the name of the Carbine.
Changed the way the Gygax work.

It now have less defense and less Deflecting chance, but
faster movement speed, as it should be.
-Copypasted the old indentation and fixed the bullet path
type because I'm dumb
-Removed the useless step_energy_drain on the Dark Gygax
Changed the Step battery drain, from 1 to 3.
Merge pull request #2391 from ManeaterMildred/MechUpdate

Mech Update : Gygax, Ion and Carbine