Add Murder/Protect/Exile API without checks

Add Murder/Protect/Exile API without checks

Force(.*)Async will perform the same function as \1Async but without
throwing exceptions. The old API is maintained for backwards
compatibility reasons.

Murder checks are now shared with the main function that handles
CheckMurder, as ProtectPlayerAsync and ExileAsync aren't used in the
code I didn't make a similar change there. Checks were also synced
between both methods