Remove open exploits

Broken voiding of attackers' attack orders is being removed for now, too.
Development of this feature will go on in feature/better-stealth.
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For Seraphim ACU shot being visible through FoW - original unmodified
files
Sera ACU shot FoW visibility fix

Fixing the Sera ACU shot being visible through fog of war. Upped the
LODCutoff distance because it was too low resulting in the shot emitters
disappearing too fast now that the EmitIfVisible value is set to true.
Update readme

For Sera ACU shot FoW visiblity fix