Added Grenadier as Atreides starting unit
AUTHORS
INotifyCreated
Appears to fix sticky locking of preplaced buildings
Allow actors that are not buildings to be sold.

The more humane way to refund units (as opposed the grinding them).
Fixed D2K turrets.
Merge pull request #6065 from atlimit8/SellNonBuildings

Sell non buildings
Merge pull request #6014 from atlimit8/FixBuildingsLockedOnWorldLoad

Fix buildings locked on world load
Merge pull request #6061 from MustaphaTR/d2k-starting-units

Added grenadier as Atreides starting unit