Balance changes:
Hard + Impossible Upgrade Locking
Both hard and Impossible can now lock 1 more upgrade.
Hard can now lock 3 upgrades from being picked, the computer will select 1.
Impossible can now lock 2 upgrades from being picked, the computer will select 2.
Impossible difficulty upgrades
Reduced spawn rate upgrade from 4 -> 2.
Human
Robotics lab spawn amount decreased from 5 -> 4.
Robotics lab spawn rate increased from 14 -> 18.
General
Updated the evolution text for negative armor to be more understandable.
Engine
More garbage collection and memory checking.
Found more places where we needed to convert from raycasting to spatial grid.
Fixed a small null ref bug on targeting from buildings.
Level editor
Fixed another upload issue.