Added <RevealOnDamage> config option, true by default. If set to false, stealthed grids will not be revealed when damaging other grids.

Added 1x1 drive to stealth block variant group

Added 1x1x1 large grid drive (has 10s base stealth time by default)

Stealth drives and heat sinks are now defined in the world/server config file.
This means that you can now define any block of type "UpgradeModule" in the config as either a drive or a heatsink, and it will have the appropriate logic attached.
Note that for the moment, heat sink damage zone is hard-coded to the dimensions of the existing large/small grid heat sink blocks.

Added config options for water interaction:
<WorkInWater> - Disables drive while underwater if false
<WorkOutOfWater> - Disables drive while out of water if false
<WaterTransitionDepth> Height in metres above mean sea level to enable/disable drives at if either of the above settings are false

Fixed <HideThrusterFlames> config option not doing anything
Fixed heat sink <DoDamage> config option not doing anything
Fixed large grid heat sink build stage models

Taking damage will no longer disable stealth if <DamageThreshold> config option is set to 0

Changed the Heat Signal Range modifier to accept values < 1.

Fixed configuration settings not applying to multiplayer clients.

Added additional API methods.

Fixed several bugs with heat sinks causing them to not be counted toward total duration etc.

Fixed oxygen farms unstealthing themselves.

Armour edges are re-enabled and are now hidden dynamically.
Thruster flames are now hidden by default.

Added API for both mod and PB.