Extend using INotifyBuildComplete to Production.
Made AnnounceOnBuild implement INotifyBuildComplete.
Copy Mods.Common to the correct location after build.
Merge pull request #6852 from pchote/fix-modscommon-xbuild

Copy Mods.Common.dll to the correct location after build.
Merge pull request #6851 from atlimit8/BuildingCompleteForProduction

Use INotifyBuildComplete for Production & AnnounceOnBuild
remove BelowUnits

closes #3670
private readonly elsewhere unused variables
Merge pull request #6456 from Mailaender/remove-belowunits

Removed the BelowUnits trait
Fixed RepairBridgeOrderTargeter & hut logic - it now ignores dangling bridges & rejects bridges under repair

	Closes #4354
fixes crash in minimap generator for some of maps
Merge pull request #6789 from atlimit8/FixRepairBridgeOrderTargeter

Fixed RepairBridgeOrderTargeter & hut logic - it now ignores dangling bridges
Merge pull request #6861 from ihptru/utility-fix

fixes crash in minimap generator for some of maps