Version 1.0.15.3

More graphical upgrades and new decals by YellowMiner. Some modules now change appearance as tech level increases.
Decals are now organised into categories, like modules.
You can now paint modules like hatches with the paint tool.
You can now hold down space to paint decals with the paint tool.
Multiplayer world generation is no longer stuck indefinitely if one of the players disconnects while it's going on.
Added confirm dialog to flee/surrender button.
The AI now leaves after fully raiding a city in multiplayer.
Fixed impact force for beam weapons.
Fleshcrackers no longer shoot crew held by their own tentacles. After all, they're about to eat them.
The targeting AI is no longer supernaturally aware of the location of pressurised suspendium chambers, making them more viable.
You can now make mods that use bonusable values to change the appearance of modules and armour. This would previously crash the game.
Miscellaneous other GUI improvements.