fix/workaround for fullscreen crash in 0.9.24

minor simplification of conditions for not spawning a visual gear - also allows lua to spawn clouds critically or non-critically. We probably shouldn't even exempt clouds from this, and just spawn them once synced, but, eh, probably isn't a significant hit since sheepluva made the motion more efficient.

Fix crash when firing portal gun at low quality graphics

Added tag 0.9.24-release for changeset a4e7e62f2c0d

Install platforms dir too

enable stretchLastSection