Improvements to Oshan and Geothermal

[Decarcassor]

Oshan doesn't really need pre-hotspot power generation. The default reserve power of Oshan can sustain the station for most of a shift with the exception of power hungry department like QM or telesci. And its trivialy easy to use one the many local generators that cargo can order. If you don't want to deal with geothermal power, just ask the quartermasters for the hamsters wheels your heart desire.

Its less a problem with the map's design itself and more of a problem with players not wanting or knowing how to deal with it.