MultiListInt - want to return the Entry, not the actual value in getNextEntryForList (these will many times be the same).
Check for nexts not being allocated (if we never add to the same list, return Const.No_ENTRY) in this case.

Adding Typed Collection vs regular Collection interfaces

Int Value Converter can now take an int and convert to other types

Started tests for Hash (need to start deleting bool, others passing).