Add Mods.Common reference to Mods.Cnc
Move Smoke effect, ContrailFader effect, SmudgeLayer and LeaveSmudgeWarhead to Mods.Common
Move PlayMusicOnMapLoad to Mods.Common
Move ResourceClaim and ResourceClaimLayer to Mods.Common
Bring Mods.Common includes in alphabetical order
Merge pull request #6663 from reaperrr/common-stuff4

Moved more stuff to Mods.Common