Fixes entity renderer translating it 1/4 block to high compared to the
hitbox.
Fixed the hitbox being either a bit too small or too large depending on
the used constructor.
Updated the model for tiny TNT to be a bit more compact.
This is first update pass, which is mainly import reorganization, name
fixes, etc... Although some parts of second were done where changes
aren't important.
Errors: ~1400 -> 82.
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.