Get rid of enum CharacterClass

[dmorcellet]

This enum is hard coded. Use the ClassesManager that relies on XML data.

[dmorcellet]

Class key is used in requirements: Used in: barterers,effect buffs, loot tables, relics, deeds, quests, items

• race key: class/initial gear

[dmorcellet]

Most of the work is done. Still TODO:

• data import: check that it still work, and check for changes
• revamp class icons management : shall be outside of the companion jar.

[dmorcellet]

Revamp of class icons: done Data import: OK Except for the loot tables that reference Monster Classes.

[dmorcellet]

Added minimal support for monster classes. So that they are useable in usage requirements (loot, items...).

[dmorcellet]

Done.