Highscore db changes for the GUI.

Highscore db changes for the GUI.

* Moved encounters inside difficulties instead of the other way around. This was mostly for GUI reasons, as it makes more sense to change encounter without having to change diff than the other way around.
* The get methods now in most cases return data formatted so it can be directly used by ace-gui dropdowns.
* Added number of results to the get methods, as the "#" operator doesnt work when having specified keys.