Added Feed functionality
 - Care/Feed now resets timer for fish being hungry
 - Timer checks if fish are hungry yet
 - Timer starts only after first fish is added
 - After a long enough time not being fed, all fish (not decor) is deleted
   - Should work with animated chest if chest is not a CFish class type (ie CItem type)
   - Note: virtual bool IsFish() added to CItem.h and CFish.h
Added Feed functionality
 - Care/Feed now resets timer for fish being hungry
 - Timer checks if fish are hungry yet
 - Timer starts only after first fish is added
 - After a long enough time not being fed, all fish (not decor) is deleted
   - Should work with animated chest if chest is not a CFish class type (ie CItem type)
   - Note: virtual bool IsFish() added to CItem.h and CFish.h