Dev-freeze fixes and tweaks

* Adds variable power setting for heaters and freezers
* Makes APC cell type an actual type, APCs in areas with heavy machinery come with a high-power cell by default.
* Fixes old APC power switching bug caused by the conditions for going from autoflag=1 to autoflag=0 being the same as when going in the reverse direction. Now going from 1->0 requires a lack of long-term power, while 0->1 requires the presence of long-term power.
* Reduces SM damage rate cap. Still a bit faster than master, but not as fast as before.
* Fixes some engine bits on the map that got copied into space accidentally.
* Increases max SMES input/output to 250 kW. Now the engine SMES should handle the third freezer.
* SMESs start with more charge by default.
* Adjusted disposal bins. Now takes under 10 minutes to repressurize. See #6232
* Heating due to air compression is now a config file option. Set to 1 for full effect, 0 to disable, or something in between.