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.
This should no longer keep a reference to a World around and potentially
keep them loaded.
Also added a finalize() to CompassRegion to ensure the file is closed on a
GC.
Some cleanup regarding member order, final, etc
Reworked whole Version Checker with an extensible interface to add any other service later on easier.
The version checker now has its own config file, to collect the different options and extract them from the main config file.
In that you can specify how fine the versions should be checked.
