Update 67 - Cleaning Grenades, Explosion Changes, Rubber Bullet Removal

This week brings a very useful tool for all janitors, the cleaner grenade. Once detonated, it will spread foam across dozens of tiles, cleaning them of any unwanted reagents. Rubber bullets are no longer unobtainable; this does not affect shotgun ammo, however. Stacked explosives now spread their damage to further distances rather than making a combined, smaller explosion. As well as other great additions such as arcade machines providing cool ambience and voicemasks letting you copy species speech sounds.