Hotfix: recent change to Purifier Flamethrower damage should now work correctly

- Maximum number of faction heroes to recruit is increased to 3 for all factions.
- Spawn rate of EXALT Elite Shieldbearers is slightly increased

- Elite EXALT units have finally learned to use Hunker Down
- Base damage of Flamethrower is set to 1-2 for all tiers of Purifiers

- Spawn rates of late-game EXALT units are significantly reduced. The chances to appear are still higher than for other units, but players should expect more variety in enemy compositions
- One armor is added to tier 3 ADVENT Trooper on Legend difficulty level
- Descriptions of Silent Killer and Deadeye abilities are updated

Various localization and description updates (related to mod-only gear)

- Hack Defense reduction of EMP Grenade, EMP Bomb and Bluescreen Rounds is set to 30
- Bad tooltip is removed from description of Bluescreen Rounds

Hotfix: attacks of late-game Wild Chryssalids are no longer guaranteed to miss against mimic beacons

- Centurions are set to spawn slightly later into the campaign
- Centurions can no longer spawn as leaders of weak pods

- The order of abilities in Sharpshoters' perk tree is reverted to vanilla one (this change does not impact promoted soldiers in existing campaigns)
- Centurions can no longer attack during rapid reaction. Unstable Thrusters ability is removed
- Description of Alloy Vest is updated

More localization fixes