Too Many Asteroids! (Optimisation Update) — Metori Steam update #290977

​I've finally been able to get to cutting down some wasted frame times to do with asteroids! Previously, an entry level gaming computer would get about 5-10fps when playing with 5000+ asteroids in a small area. Now you can expect between 100-200fps in that same area. Better PCs can expect upwards of 400fps in Instant Action. Changes: -Asteroids now only update every half second or so -Asteroids now slow down if they're going too fast every update -Harvesters now mine far more effectively, and don't panic with too many asteroids. (This could still be optimized more) -An already mined asteroid now spawns mined asteroids when split! (It's now possible to mine the universe dry) Go even further beyond, pilots!