Fixed broken reward mechanic, now its actually possible to get more than Hussar, Sapper and Mamba from covert operations
Fixed maim, detonation shot and twin fangs being free actions

- Added Warmaster, this is a heroic Muton Devastator, he is a unflankable walking tank that can be used as high cover, he can run through walls like Andromedons or Berserkers and he has the unique ability as playable alien that he is trainable as officer
- Warmaster has three different weapons, rippling rifle is an assault rifle and his primary, this causes psi plague that can spread to nearby units, but it is weaker compared to actual assault rifles.
- Secondary weapon is lightning claw, this requires adjacent melee, but hits quite hard and can even stun units, Elite version gives dash melee attack.
- Third weapon is invisible in the armory, but its a Lance Pistol, this applies a debuff on any unit it hits, giving it 25% damage taken increase, pistol row perks are accessible for this alien so you can upgrade this thing.
- Buffed Viper Commando pistol
- Winter Sentinel has +10 aim on his character
- Some minor fixes to xcom rows