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.
Every Block had a call to its super, passing its own class.
This can easily be simulated by calling `this.getClass()` in the super class.
Also this was basically only used as using a name.
In the future it might be advisable to not use such methods,
since they are prone to refactoring.