[WIP] BEEEAAAAMS (and atmos/supermatter fixes)

Plus a lot of fixes that became intertwined.
```yaml
- rscadd: "BEAMS!  Emitters now put out a constant beam of energy, which is far less laggy that the old bullet-based method.  They also look cooler."
- rscadd: "Prisms can combine emitter beams that multiply the damage."
- rscadd: "Infrared triggers use the same system as emitters."
- rscadd: "Burst HE pipes have their own sprite"
- rscadd: "High-performance event observers (needed for beams)"
- rscadd: "Supermatter audio alerts"
- rscadd: "Added radiation floor decals."
- bugfix: "Burst pipes are no longer baleeted by their own explosions."
- bugfix: "Pipes are given time to release pressure before the next round of pressure checks."
- bugfix: "Explosions are slightly delayed to avoid choruses of simultaneous explosions"
- bugfix: "Gas miners no longer melt."
```