Removes the split collection as in some rare corner cases the insertion
order is important to maintain the correct data in terms of self cleaning.
Keeps the general cleanups and split of Fluid/ItemList.
Fixes#1964
Reduces the visibility of all fields to private and create setters/getters
when necessary. Exceptions are fields with GuiSync as these need to be
public.
Reduces the visibility of internal methods to private/protected/default when possible.
Splitted the ItemList and MeaningfulIterator into an item and fluid
version.
Added an IdentityHashMap as additional item layer to the ItemList for a
faster access.
Refactored FluidList, findFuzzy will now return the same fluid instead of
an empty collection.
Many exceptions got an improvement due to changed class or description or details it is providing.
Is not complete, needs to be done in patches in the regions, where it is needed, since some are just
swallowed.
Removed total usage of pure RuntimeExceptions to 0.
yueh