enum SubCell => int & Dictionary<SubCell, WVec> => WVec[]
Moved MobileInfo.SubCellOffsets to Map (dropping static) & added Map.SubCellsDefaultIndex
Load subcells and default subcell index from mod.yaml
Remove sub-cell offset bounds checking
reverted mod.yaml in cnc, d2k, & ra
Merge pull request #6100 from atlimit8/Implement6086

Closes #6086