Air scrubbers do not recognize farts as a gas.

[MrGlasses]

As the title implies, with the addition of the new atmospherics constructor, I attempted to build a fart extractor. Unfortunately when going through the packet building for the scrubbers I found out that the scrubbers simply cant recognize farts to extract the list of extractable gases is as follows.  Oxygen, Nitrogen, Carbon_dioxide, radgas (Plasma), nitrous_oxide, and Oxygen_agent_b. I believe that farts should be added to the list of extractable gasses, since why wouldnt it? Plus it would make getting methane for nuclear engines and such much easier.