* I wasn't expecting almost 1000 lines of code, but I've taken the challenge anyways.
* Placed localized `synchronized ()` not only for those 2 _**Vector**_ containers from _controllers_ field, but also for the 2 __*ArrayList*__ in __*ControllerGroup*__ class.
* Mostly for all sections doing iteration on them, but also when their **size()** changes.
* Prepended `@Override` for all inherited methods in __*ControllerGroup*__ class.
* Prepended `final` for all fields which didn't seem they would be re-assigned.
* Lotsa further cleanups I can't remember I did. :P
